<PAGE>

                                                                  EXHIBIT 4.1(a)

================================================================================


               D.R. HORTON, INC. AND THE GUARANTORS PARTY HERETO

                 Zero Coupon Convertible Senior Notes Due 2021

                            ______________________

                        Eleventh Supplemental Indenture

                           Dated as of May 11, 2001

                            ______________________

                   AMERICAN STOCK TRANSFER & TRUST COMPANY,
                                    Trustee


================================================================================
<PAGE>

                                  ARTICLE ONE


                   Scope of Supplemental Indenture; General

                                  ARTICLE TWO


                              Certain Definitions

                                 ARTICLE THREE

                                   Covenants
<TABLE>
<S>                                                                                       <C>
Section 3.01.  Limitations on Indebtedness............................................... 28
Section 3.02.  Limitations on Restricted Payments........................................ 29
Section 3.03.  Limitations on Transactions with Affiliates............................... 31
Section 3.04.  Limitations on Dispositions of Assets..................................... 32
Section 3.05.  Limitations on Liens...................................................... 33
Section 3.06.  Limitations on Restrictions Affecting Restricted Subsidiaries............. 34
Section 3.07.  Limitations on Mergers, Consolidations and Sales of Assets................ 34
Section 3.08.  Reports to Holders of Notes............................................... 35

                                  ARTICLE FOUR

                           REDEMPTION AND CONVERSIONS

Section 4.01.  Optional Redemption by the Company........................................ 36
Section 4.02.  Purchase at Option of the Holder upon a Fundamental Change................ 38
Section 4.03.  Purchase of Notes at the Option of the Holder; Payment of
                Purchase Price or Fundamental Change Purchase Price in Stock............. 39
Section 4.04.  Further Conditions for Purchase at the Option of Holders upon a
                Fundamental Change and Purchase of Notes at the Option of the
                Holder................................................................... 46
Section 4.05.  Conversion of Notes....................................................... 49
Section 4.06.  Adjustments to Conversion Rate............................................ 51
Section 4.07.  Miscellaneous Provisions Relating to Conversion........................... 56
Section 4.08.  Optional Conversion to Semi-Annual Cash Pay Note upon Tax Event........... 59
Section 4.09.  Calculation of Original Issue Discount for U.S. Federal Income
                Tax Purposes............................................................. 60
</TABLE>
<PAGE>

                                      -2-

<TABLE>
<S>                                                                                       <C>
Section 4.10.  Payment of Interest....................................................... 61

                                  ARTICLE FIVE

                                 Miscellaneous

Section 5.02.  Events of Default......................................................... 63
Section 5.02.  Defeasance................................................................ 63
Section 5.03.  Amendments................................................................ 64
Section 5.04.  Governing Law............................................................. 64
Section 5.05.  No Adverse Interpretation of Other Agreements............................. 64
Section 5.06.  No Recourse Against Others................................................ 64
Section 5.07.  Successors and Assigns.................................................... 64
Section 5.08.  Duplicate Originals....................................................... 65
Section 5.09.  Severability.............................................................. 65
Exhibit A      Form of Note
Exhibit B      Projected Payment Schedule
</TABLE>
<PAGE>

          ELEVENTH SUPPLEMENTAL INDENTURE dated as of May 11, 2001
("Supplemental Indenture"), to the Indenture dated as of June 9, 1997 (as
------------------------
amended, modified or supplemented from time to time in accordance therewith, the
"Indenture"), by and among D.R. HORTON, INC., a Delaware corporation (the
 ---------
"Company"), each of the Guarantors (as defined herein) and AMERICAN STOCK
--------
TRANSFER & TRUST COMPANY, as trustee (the "Trustee").
                                           -------

          Each party agrees as follows for the benefit of the other party and
for the equal and ratable benefit of the holders of Notes (as defined herein):

          WHEREAS, the Company, the Guarantors and the Trustee have duly
authorized the execution and delivery of the Indenture to provide for the
issuance from time to time of senior debt securities (the "Securities") to be
                                                           ----------
issued in one or more series as in the Indenture provided;

          WHEREAS, the Company and the Guarantors desire and have requested the
Trustee to join them in the execution and delivery of this Supplemental
Indenture in order to establish and provide for the issuance by the Company of a
series of Securities designated as its Zero Coupon Convertible Senior Notes Due
2021 in the aggregate principal amount at maturity of up to $438,279,000,
substantially in the form attached hereto as Exhibit A (the "Notes"), guaranteed
                                                             -----
by the Guarantors, on the terms set forth herein;

          WHEREAS, Section 2.01 of the Indenture provides that a supplemental
indenture may be entered into by the Company, the Guarantors and the Trustee for
such purpose provided certain conditions are met;

          WHEREAS, the conditions set forth in the Indenture for the execution
and delivery of this Supplemental Indenture have been complied with; and

          WHEREAS, all things necessary to make this Supplemental Indenture a
valid agreement of the Company, the Guarantors and the Trustee, in accordance
with its terms, and a valid amendment of, and supplement to, the Indenture have
been done;

          NOW, THEREFORE:

          In consideration of the premises and the purchase and acceptance of
the Notes by the holders thereof the Company and the Guarantors mutually
covenant and agree with the Trustee, for the equal and ratable benefit of the
holders, that the Indenture is supplemented and amended, to the extent expressed
herein, as follows:
<PAGE>

                                      -2-




                                  ARTICLE ONE

                    Scope of Supplemental Indenture; General

          The changes, modifications and supplements to the Indenture effected
by this Supplemental Indenture shall be applicable only with respect to, and
govern the terms of, the Notes, which shall be limited in aggregate principal
amount to $381,113,000 (or up to $438,279,000 if the over-allotment option is
exercised pursuant to the Underwriting Agreement) in one series, and shall not
apply to any other Securities that may be issued under the Indenture unless a
supplemental indenture with respect to such other Securities specifically
incorporates such changes, modifications and supplements. Pursuant to this
Supplemental Indenture, there is hereby created and designated a series of
Securities under the Indenture entitled "Zero Coupon Convertible Senior Notes
Due 2021." The Notes shall be in the form of Exhibit A hereto. The Notes shall
                                             ---------
be guaranteed by the Guarantors as provided in such form and the Indenture. The
Notes may bear an appropriate legend regarding original issue discount for
federal income tax purposes.

          The aggregate Principal Amount of the Notes shall be payable on the
Final Maturity Date unless the Accreted Value or the Restated Principal Amount
has been earlier repaid or the Notes have been converted in accordance with this
Supplemental Indenture.

          The Notes shall be issued at an Issue Price of $524.78 per $1,000
Principal Amount. Except as provided for in Sections 4.08 and 4.10 and
paragraphs 1, 5 and 11 of the Notes, there shall be no periodic payments of
interest on the Notes. The calculation of the Accreted Value in the period
during which each Note remains outstanding shall be on a semi-annual bond
equivalent basis using a 360-day year composed of twelve 30-day months, and such
accrual shall commence on the Issue Date of the Notes. In the event of the
maturity, conversion, purchase by the Company at the option of a Holder or
redemption of a Note, Accreted Value, if any, shall cease to accrue on such
Note, under the terms and subject to the conditions of this Supplemental
Indenture.

          The Notes shall be payable and may be presented for payment, purchase,
conversion, registration of transfer and exchange, without service charge, at
the office of the Company maintained for such purpose in New York, New York,
which shall initially be the office or agency of the Trustee.

                                  ARTICLE TWO

                              Certain Definitions

          The following terms have the meanings set forth below in this
Supplemental Indenture.  Capitalized terms used but not defined herein have the
meanings ascribed to such terms in the Indenture.  To the extent terms defined
herein differ from the Indenture the terms defined herein will govern.
<PAGE>

                                      -3-

          "Accreted Conversion Price" means the price determined by dividing (x)
           -------------------------
the Accreted Value at the reference date, by (y) the Conversion Rate.

          "Accreted Value" means, at any date of determination, (1) prior to
           --------------
such time as the Notes are converted to Cash Pay Notes, the sum of (x) the
Issue Price of each Note and (y) the portion of the excess of the Principal
Amount of each Note over the Issue Price which shall have been amortized by the
Company in accordance with GAAP through such date, such amount to be so
amortized on a daily basis and compounded semi-annually on each May 11 and
November 11 at the rate of 3.25% per annum from the Issue Date through the date
of determination computed on the basis of a 360-day year of twelve 30-day months
and (2) at or after such time as the Notes are converted to Cash Pay Notes, the
Restated Principal Amount.

          "Acquired Indebtedness" means (i) with respect to any Person that
           ---------------------
becomes a Restricted Subsidiary (or is merged into the Company or any Restricted
Subsidiary) after the Issue Date, Indebtedness of such Person or any of its
Subsidiaries existing at the time such Person becomes a Restricted Subsidiary
(or is merged into the Company or any Restricted Subsidiary) that was not
incurred in connection with, or in contemplation of, such Person becoming a
Restricted Subsidiary (or being merged into the Company or any Restricted
Subsidiary) and (ii) with respect to the Company or any Restricted Subsidiary,
any Indebtedness expressly assumed by the Company or any Restricted Subsidiary
in connection with the acquisition of any assets from another Person (other than
the Company or any Restricted Subsidiary), which Indebtedness was not incurred
by such other Person in connection with or in contemplation of such acquisition.
Indebtedness incurred in connection with or in contemplation of any transaction
described in clause (i) or (ii) of the preceding sentence shall be deemed to
have been incurred by the Company or a Restricted Subsidiary, as the case may
be, at the time such Person becomes a Restricted Subsidiary (or is merged into
the Company or any Restricted Subsidiary) in the case of clause (i) or at the
time of the acquisition of such assets in the case of clause (ii), but shall not
be deemed Acquired Indebtedness.

          "Affiliate" means, when used with reference to a specified Person, any
           ---------
Person directly or indirectly controlling or controlled by or under direct or
indirect common control with the Person specified.

          "Affiliate Transaction" has the meaning set forth in Section 3.03
           ---------------------
hereof.

          "Asset Acquisition" means (i) an Investment by the Company or any
           -----------------
Restricted Subsidiary in any other Person if, as a result of such Investment,
such Person shall become a Restricted Subsidiary or shall be consolidated or
merged with or into the Company or any Restricted Subsidiary or (ii) the
acquisition by the Company or any Restricted Subsidiary of the assets of any
Person, which constitute all or substantially all of the assets or of an
operating unit or line of business of such Person or which is otherwise outside
the ordinary course of business.

          "Asset Disposition" means any sale, transfer, conveyance, lease or
           -----------------
other disposition (including, without limitation, by way of merger,
consolidation or sale and leaseback or
<PAGE>

                                      -4-

sale of shares of Capital Stock in any Subsidiary) (each, a "transaction") by
                                                             -----------
the Company or any Restricted Subsidiary to any Person of any Property having a
fair market value in any transaction or series of related transactions of at
least $10 million. The term "Asset Disposition" shall not include (i) a
                             -----------------
transaction between the Company and any Restricted Subsidiary or a transaction
between Restricted Subsidiaries, (ii) a transaction in the ordinary course of
business, including, without limitation, sales (directly or indirectly),
dedications and other donations to governmental authorities, leases and sales
and leasebacks of (A) homes, improved land and unimproved land and (B) real
estate (including related amenities and improvements), (iii) a transaction
involving the sale of Capital Stock of, or the disposition of assets in, an
Unrestricted Subsidiary, (iv) any exchange or swap of assets of the Company or
any Restricted Subsidiary for assets that (x) are to be used by the Company or
any Restricted Subsidiary in the ordinary course of its Real Estate Business and
(y) have a Fair Market Value not less than the Fair Market Value of the assets
exchanged or swapped, (v) any sale, transfer, conveyance, lease or other
disposition of assets and properties of the Company that is governed by Section
3.07 hereof, or (vi) dispositions of mortgage loans and related assets and
mortgage-backed securities in the ordinary course of a mortgage lending
business.

          "Attributable Debt" means, with respect to any Capitalized Lease
           -----------------
Obligations, the capitalized amount thereof determined in accordance with GAAP.

          "Bankruptcy Law" means title 11 of the United States Code, as amended,
           --------------
or any similar federal or state law for the relief of debtors.

          "Bid Agent" means a bid solicitation agent appointed by the Company to
           ---------
act in such capacity pursuant to paragraph 3 of the Notes.

          "Board of Directors" means the Board of Directors of the Company or
           ------------------
any committee thereof duly authorized to act on behalf of the Board of
Directors.

          "Business Day" means each Monday, Tuesday, Wednesday, Thursday and
           ------------
Friday which is not a day on which banking institutions in New York, New York
are authorized or obligated by law or executive order to close.

          "Capital Stock" means, with respect to any Person, any and all shares,
           -------------
interests, participations or other equivalents (however designated) of or in
such Person's capital stock or other equity interests, and options, rights or
warrants to purchase such capital stock or other equity interests, whether now
outstanding or issued after the Issue Date, including, without limitation, all
Disqualified Stock and Preferred Stock.

          "Capitalized Lease Obligations" of any Person means the obligations of
           -----------------------------
such Person to pay rent or other amounts under a lease that is required to be
capitalized for financial reporting purposes in accordance with GAAP, and the
amount of such obligations will be the capitalized amount thereof determined in
accordance with GAAP.
<PAGE>

                                      -5-

          "Cash" has the meaning provided in Section 4.03.
           ----

          "Cash Dividends" has the meaning assigned thereto in Exhibit A hereto.
           --------------

          "Cash Equivalents" means:  (a) U.S. dollars; (b) securities issued or
           ----------------
directly and fully guaranteed or insured by the U.S. government or any agency or
instrumentality thereof having maturities of one year or less from the date of
acquisition; (c) certificates of deposit and eurodollar time deposits with
maturities of one year or less from the date of acquisition, bankers'
acceptances with maturities not exceeding six months and overnight bank
deposits, in each case with any domestic commercial bank having capital and
surplus in excess of $500 million; (d) repurchase obligations with a term of not
more than seven days for underlying securities of the types described in clauses
(b) and (c) entered into with any financial institution meeting the
qualifications specified in clause (c) above; (e) commercial paper rated P-1, A-
1 or the equivalent thereof by Moody's Investors Service, Inc. or Standard &
Poor's Ratings Group, respectively, and in each case maturing within six months
after the date of acquisition; and (f) investments in money market funds
substantially all of the assets of which consist of securities described in the
foregoing clauses (a) through (e).

          "Cash Pay Notes" means the Notes, after they have been converted to
           --------------
semi-annual cash pay Notes following the occurrence of a Tax Event.

          "Closing Price" with respect to any securities on any day means the
           -------------
closing sale price regular way on such day or, in case no such sale takes place
on such day, the average of the reported closing bid and asked prices, regular
way, in each case on the New York Stock Exchange, or, if such security is not
listed or admitted to trading on such Exchange, on the principal national
security exchange or quotation system on which such security is quoted or listed
or admitted to trading, or, if not quoted or listed or admitted to trading on
any national securities exchange or quotation system, the average of the closing
bid and asked prices of such security on the over-the-counter market on the day
in question as reported by the National Quotation Bureau Incorporated, or a
similar generally accepted reporting service, or if not so available, in such
manner as furnished by any New York Stock Exchange member firm selected from
time to time by the Board of Directors for that purpose, or a price determined
in good faith by the Board of Directors or, to the extent permitted by
applicable law, a duly authorized committee thereof, whose determination shall
be conclusive.
<PAGE>

                                      -6-

          "Common Equity" of any Person means Capital Stock of such Person that
           -------------
is generally entitled to (i) vote in the election of directors of such Person or
(ii) if such Person is not a corporation, vote or otherwise participate in the
selection of the governing body, partners, managers or others that will control
the management or policies of such Person.

          "Common Stock" means the common stock of the Company, par value $.01
           ------------
per share, as it exists on the Issue Date and any shares of any class or classes
of capital stock of the Company resulting from any reclassification or
reclassifications thereof and which have no preference in respect of dividends
or of amounts payable in the event of any voluntary or involuntary liquidation,
dissolution or winding-up of the Company and which are not subject to redemption
by the Company; provided, however, that if at any time there shall be more than
one such resulting class, the shares of each such class then so issuable on
conversion of Notes shall be substantially in the proportion which the total
number of shares of such class resulting from all such reclassifications bears
to the total number of shares of all such classes resulting from all such
reclassifications.

          "Company Notice" has the meaning provided in Section 4.03.
           --------------

          "Company Notice Date" has the meaning provided in Section 4.03.
           -------------------

          "Consolidated Adjusted Tangible Assets" of the Company as of any date
           -------------------------------------
means the Consolidated Tangible Assets of the Company and the Restricted
Subsidiaries at the end of the fiscal quarter immediately preceding the date
less any assets securing any Non-Recourse Indebtedness, as determined in
accordance with GAAP.

          "Consolidated Cash Flow Available for Fixed Charges" means, for any
           --------------------------------------------------
period, on a consolidated basis for the Company and the Restricted Subsidiaries,
Consolidated Net Income for such period plus (each to the extent deducted in
calculating such Consolidated Net Income and determined in accordance with GAAP)
(a) the sum for such period, without duplication, of (i) income taxes, (ii)
Consolidated Interest Expense, (iii) depreciation and amortization expenses and
other non-cash charges to earnings and (iv) interest and financing fees and
expenses which were previously capitalized and which are amortized to cost of
sales, minus (b) all other non-cash items (other than the receipt of notes
receivable) increasing such Consolidated Net Income.

          "Consolidated Fixed Charge Coverage Ratio"  means, with respect to any
           ----------------------------------------
determination date, the ratio of (x) Consolidated Cash Flow Available for Fixed
Charges for the prior four full fiscal quarters (the "Four Quarter Period") for
                                                      -------------------
which financial results have been reported immediately preceding the
determination date (the "Transaction Date"), to (y) the aggregate Consolidated
                         ----------------
Interest Incurred for the Four Quarter Period.  For purposes of this
<PAGE>

                                      -7-

definition, "Consolidated Cash Flow Available for Fixed Charges" and
"Consolidated Interest Incurred" shall be calculated after giving effect on a
pro forma basis for the period of such calculation to (i) the incurrence or the
repayment, repurchase, defeasance or other discharge or the assumption by
another Person that is not an Affiliate (collectively, "repayment") of any
                                                        ---------
Indebtedness of the Company or any Restricted Subsidiary (and the application of
the proceeds thereof) giving rise to the need to make such calculation, and any
incurrence or repayment of other Indebtedness (and the application of the
proceeds thereof), at any time on or after the first day of the Four Quarter
Period and on or prior to the Transaction Date, as if such incurrence or
repayment, as the case may be (and the application of the proceeds thereof),
occurred on the first day of the Four Quarter Period, except that Indebtedness
under revolving credit facilities shall be deemed to be the average daily
balance of such Indebtedness during the Four Quarter Period (as reduced on such
pro forma basis by the application of any proceeds of the incurrence of
--- -----
Indebtedness giving rise to the need to make such calculation); (ii) any Asset
Disposition or Asset Acquisition (including, without limitation, any Asset
Acquisition giving rise to the need to make such calculation as a result of the
Company or any Restricted Subsidiary (including any Person that becomes a
Restricted Subsidiary as a result of any such Asset Acquisition) incurring
Acquired Indebtedness at any time on or after the first day of the Four Quarter
Period and on or prior to the Transaction Date), as if such Asset Disposition or
Asset Acquisition (including the incurrence or repayment of any such
Indebtedness) and the inclusion, notwithstanding clause (ii) of the definition
of "Consolidated Net Income," of any Consolidated Cash Flow Available for Fixed
Charges associated with such Asset Acquisition as if it occurred on the first
day of the Four Quarter Period; provided, however, that the Consolidated Cash
                                --------  -------
Flow Available for Fixed Charges associated with any Asset Acquisition shall not
be included to the extent the net income so associated would be excluded
pursuant to the definition of "Consolidated Net Income," other than clause (ii)
thereof, as if it applied to the Person or assets involved before they were
acquired; and (iii) the Consolidated Cash Flow Available for Fixed Charges and
the Consolidated Interest Incurred attributable to discontinued operations, as
determined in accordance with GAAP, shall be excluded. Furthermore, in
calculating "Consolidated Cash Flow Available for Fixed Charges" for purposes of
determining the denominator (but not the numerator) of this "Consolidated Fixed
Charge Coverage Ratio," (1) interest on Indebtedness in respect of which a pro
                                                                           ---
forma calculation is required that is determined on a fluctuating basis as of
-----
the Transaction Date (including Indebtedness actually incurred on the
Transaction Date) and which will continue to be so determined thereafter shall
be deemed to have accrued at a fixed rate per annum equal to the rate of
                                          --- -----
interest on such Indebtedness in effect on the Transaction Date; and (2)
notwithstanding clause (1) above, interest on such Indebtedness determined on a
fluctuating basis, to the extent such interest is covered by agreements relating
to Interest Protection Agreements, shall be deemed to accrue at the rate per
                                                                         ---
annum resulting after giving effect to the operation of such agreements.
-----
<PAGE>

                                      -8-

          "Consolidated Interest Expense" of the Company for any period means
           -----------------------------
the Interest Expense of the Company and the Restricted Subsidiaries for such
period, determined on a consolidated basis in accordance with GAAP.

          "Consolidated Interest Incurred" for any period means the Interest
           ------------------------------
Incurred of the Company and the Restricted Subsidiaries for such period,
determined on a consolidated basis in accordance with GAAP.

          "Consolidated Net Income" for any period means the aggregate net
           -----------------------
income (or loss) of the Company and its Subsidiaries for such period, determined
on a consolidated basis in accordance with GAAP; provided that there will be
                                                 --------
excluded from such net income (loss) (to the extent otherwise included therein),
without duplication:  (i) the net income (or loss) of (x) any Unrestricted
Subsidiary (other than a Mortgage Subsidiary) or (y) any Person (other than a
Restricted Subsidiary) in which any Person other than the Company or any
Restricted Subsidiary has an ownership interest, except, in each case, to the
extent that any such income has actually been received by the Company or any
Restricted Subsidiary in the form of cash dividends or similar cash
distributions during such period, which dividends or distributions are not in
excess of the Company's or such Restricted Subsidiary's (as applicable) pro rata
share of such Unrestricted Subsidiary's or such other Person's net income earned
during such period, (ii) except to the extent includable in Consolidated Net
Income pursuant to the foregoing clause (i), the net income (or loss) of any
Person that accrued prior to the date that (a) such Person becomes a Restricted
Subsidiary or is merged with or into or consolidated with the Company or any of
its Restricted Subsidiaries (except, in the case of an Unrestricted Subsidiary
that is redesignated a Restricted Subsidiary during such period, to the extent
of its retained earnings from the beginning of such period to the date of such
redesignation) or (b) the assets of such Person are acquired by the Company or
any Restricted Subsidiary, (iii) the net income of any Restricted Subsidiary to
the extent that (but only so long as) the declaration or payment of dividends or
similar distributions by such Restricted Subsidiary of that income is not
permitted by operation of the terms of its charter or any agreement, instrument,
judgment, decree, order, statute, rule or governmental regulation applicable to
that Restricted Subsidiary during such period, (iv) the gains or losses,
together with any related provision for taxes, realized during such period by
the Company or any Restricted Subsidiary resulting from (a) the acquisition of
securities, or extinguishment of Indebtedness, of the Company or any Restricted
Subsidiary or (b) any Asset Disposition by the Company or any Restricted
Subsidiary, (v) any extraordinary gain or loss together with any related
provision for taxes, realized by the Company or any Restricted Subsidiary, (vi)
any non-recurring expense recorded by the Company or any Restricted Subsidiary
in connection with a merger accounted for as a "pooling-of-interests"
transaction; provided, further, that for purposes of calculating Consolidated
             --------  -------
Net Income solely as it relates to clause (iii) of Section 3.02(a) hereof,
clause (iv)(b) above shall not be applicable.
<PAGE>

                                      -9-

          "Consolidated Net Worth" of any Person as of any date means the
           ----------------------
stockholders' equity (including any Preferred Stock that is classified as equity
under GAAP, other than Disqualified Stock) of such Person and its Restricted
Subsidiaries on a consolidated basis at the end of the fiscal quarter
immediately preceding such date, as determined in accordance with GAAP, less any
amount attributable to Unrestricted Subsidiaries.

          "Consolidated Tangible Assets" of the Company as of any date means the
           ----------------------------
total amount of assets of the Company and its Restricted Subsidiaries (less
applicable reserves) on a consolidated basis at the end of the fiscal quarter
immediately preceding such date, as determined in accordance with GAAP, less:
(i) Intangible Assets and (ii) appropriate adjustments on account of minority
interests of other Persons holding equity investments in Restricted
Subsidiaries.

          "Continuing Director" means a director who either was a member of the
           -------------------
Board of Directors of the Company on the date of this Indenture or who became a
director of the Company subsequent to such date and whose election, or
nomination for election by the Company's stockholders, was duly approved by a
majority of the Continuing Directors on the Board of Directors of the Company at
the time of such approval, either by a specific vote or by approval of the proxy
statement issued by the Company on behalf of the entire Board of Directors of
the Company in which such individual is named as nominee for director.

          "control", when used with respect to any Person, means the power to
           -------
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
               -----------       ----------
foregoing.

          "Conversion Agent" means the office or agency designated by the
           ----------------
Company where Notes may be presented for conversion.
<PAGE>

                                      -10-

          "Conversion Date" has the meaning provided in Section 4.05.
           ---------------

          "Conversion Rate" has the meaning provided in Section 4.05.
           ---------------

          "Credit Facilities" means, collectively, each of the credit facilities
           -----------------
and guidance lines of credit of the Company or one or more Restricted
Subsidiaries in existence on the date of this Supplemental Indenture and one or
more other facilities or guidance lines of credit among or between the Company
or one or more Restricted Subsidiaries and one or more lenders pursuant to which
the Company or any Restricted Subsidiary may incur indebtedness for working
capital and general corporate purposes (including acquisitions), as any such
facility or line of credit may amended, restated, supplemented or otherwise
modified from time to time, and includes any agreement extending the maturity
of, increasing the amount of, or restructuring, all or any portion of the
Indebtedness under any such facility or line of credit or any successor
facilities or lines of credit and includes any facility or line of credit with
one or more lenders refinancing or replacing all or any portion of the
Indebtedness under such facility or line of credit or any successor facility or
line of credit.

          "Currency Agreement" of any Person means any foreign exchange
           ------------------
contract, currency swap agreement or other similar agreement or arrangement
designed to protect such Person or any of its Subsidiaries against fluctuations
in currency values.

          "Custodian" means any receiver, trustee, assignee, liquidator or
           ---------
similar official under any Bankruptcy Law.

          "Default" means any event, act or condition that is, or after notice
           -------
or the passage of time or both would be, an Event of Default.

          "Defaulted Interest" has the meaning specified in Section 4.10.
           ------------------

          "Designation Amount" has the meaning provided in the definition of
           ------------------
"Unrestricted Subsidiary."

          "Disqualified Stock" means any Capital Stock that, by its terms (or by
           ------------------
the terms of any security into which it is convertible or for which it is
exchangeable), or upon the happening of any event, (i) matures or is mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, or is redeemable
at the option of the holder thereof, in whole or in part, on or prior to the
Final Maturity date of the Notes or (ii) is convertible into or exchangeable or
exercisable for (whether at the option of the issuer or the holder thereof) (a)
debt securities or (b) any Capital Stock referred to in (i) above, in each case,
at any time prior to the Final Maturity date of the Notes; provided, however,
                                                           --------  -------
that any Capital Stock that would not constitute Disqualified Stock but for
provisions thereof giving holders thereof (or the holders
<PAGE>

                                      -11-

of any security into or for which such Capital Stock is convertible,
exchangeable or exercisable) the right to require the Company to repurchase or
redeem such Capital Stock upon the occurrence of a change in control occurring
prior to the Final Maturity date of the Notes shall not constitute Disqualified
Stock if the change in control provisions applicable to such Capital Stock are
no more favorable to such holders than the provisions in paragraphs (1) through
(4) of the definition of "Fundamental Change" and such Capital Stock
specifically provides that the Company will not repurchase or redeem any such
Capital Stock pursuant to such provisions prior to the Company's repurchase of
the Notes as are required pursuant to the provisions in paragraphs (1) through
(4) of the definition of "Fundamental Change".

          "Distributed Securities" has the meaning provided in Section 4.06.
           ----------------------

          "Dollars" and "$" mean United States Dollars.
           -------       -

          "Event of Default" means:
           ----------------

          (1)   the default in payment of the Principal Amount at Final Maturity
     (or if the Notes have been converted to Cash Pay Notes, the Restated
     Principal Amount), Redemption Price, Purchase Price or Fundamental Change
     Purchase Price with respect to any Note when such amount becomes due and
     payable;

          (2)   the default in payment of any contingent interest or of interest
     which becomes payable after the Notes have been converted to Cash Pay
     Notes, which default in either case, continues for 30 days;

          (3)   the failure by the Company or any Restricted Subsidiary to
     comply with any of its agreements or covenants in, or provisions of, the
     Notes, the Guarantees or the Indenture and such failure continues for the
     period and after the notice specified below (except in the case of a
     default under Section 3.07 or 4.02, which will constitute Events of Default
     with notice but without passage of time);

          (4)   the acceleration of any Indebtedness (other than Non-Recourse
     Indebtedness) of the Company or any Restricted Subsidiary that has an
     outstanding principal amount of $25 million or more, individually or in the
     aggregate, and such acceleration does not cease to exist, or such
     Indebtedness is not satisfied, in either case within 30 days after such
     acceleration;

          (5)   the failure by the Company or any Restricted Subsidiary to make
     any principal or interest payment in an amount of $25 million or more,
     individually or in the aggregate, in respect of Indebtedness (other than
     Non-Recourse Indebtedness) of the Company or any Restricted Subsidiary
     within 30 days of such principal or interest becoming due and payable
     (after giving effect to any applicable grace period set forth in the
     documents governing such Indebtedness);
<PAGE>

                                      -12-

          (6)   a final judgment or judgments that exceed $25 million or more,
     individually or in the aggregate, for the payment of money having been
     entered by a court or courts of competent jurisdiction against the Company
     or any of its Restricted Subsidiaries and such judgment or judgments is not
     satisfied, stayed, annulled or rescinded within 60 days of being entered;

          (7)   the Company or any Restricted Subsidiary that is a Significant
     Subsidiary pursuant to or within the meaning of any Bankruptcy Law:

                (A)  commences a voluntary case,

                (B)  consents to the entry of an order for relief against it in
          an involuntary case,

                (C)  consents to the appointment of a Custodian of it or for all
          or substantially all of its property, or

                (D)  makes a general assignment for the benefit of its
          creditors;

          (8)   a court of competent jurisdiction enters an order or decree
     under any Bankruptcy Law that:

                (A)  is for relief against the Company or any Restricted
          Subsidiary that is a Significant Subsidiary as debtor in an
          involuntary case,

                (B)  appoints a Custodian of the Company or any Restricted
          Subsidiary that is a Significant Subsidiary or a Custodian for all or
          substantially all of the property of the Company or any Restricted
          Subsidiary that is a Significant Subsidiary, or

                (C)  orders the liquidation of the Company or any Restricted
          Subsidiary that is a Significant Subsidiary,

     and the order or decree remains unstayed and in effect for 60 days; or

          (9)   any Guarantee of a Guarantor which is a Significant Subsidiary
     ceases to be in full force and effect (other than in accordance with the
     terms of such Guarantee and the Indenture) or is declared null and void and
     unenforceable or found to be invalid or any Guarantor denies its liability
     under its Guarantee (other than by reason of release of a Guarantor from
     its Guarantee in accordance with the terms of the Indenture and the
     Guarantee).

          A Default as described in subclause (3) above will not be deemed an
Event of Default until the Trustee notifies the Company, or the Holders of at
least 25 percent in principal amount at maturity of the then outstanding Notes
notify the Company and the Trustee, of the Default and (except in the case of a
default under Sections 3.07 and 4.02) the Company does not cure the Default
within 60 days after receipt of the notice. The notice must specify the Default,
demand that it be remedied and state that the notice is a "Notice of Default."
If such a Default is cured within such time period, it ceases.

          "Expiration Time" has the meaning provided in Section 4.06.
           ---------------
<PAGE>

                                      -13-

          "Fair Market Value" means, with respect to any asset, the price (after
           -----------------
taking into account any liabilities relating to such assets) that would be
negotiated in an arm's-length transaction for cash between a willing seller and
a willing and able buyer, neither of which is under any compulsion to complete
the transaction, as such price is determined in good faith by the Board of
Directors of the Company or a duly authorized committee thereof, as evidenced by
a resolution of such Board or committee.

          "Final Maturity" or "Final Maturity Date" means May 11, 2021.
           --------------      -------------------

          "Five Day Period" has the meaning assigned thereto in Exhibit A
           ---------------
hereto.

          "Fundamental Change" shall be deemed to have occurred at such time
           ------------------
after the Issue Date as:

          (1)   any sale, lease or other transfer (in one transaction or a
     series of transactions) of all or substantially all of the consolidated
     assets of the Company and its Restricted Subsidiaries to any Person (other
     than a Restricted Subsidiary); provided, however, that a transaction where
                                    --------  -------
     the Holders of all classes of Common Equity of the Company immediately
     prior to such transaction own, directly or indirectly, more than 50% of all
     classes of Common Equity of such Person immediately after such transaction
     shall not be a Fundamental Change;

          (2)   a "person" or "group" (within the meaning of Section 13(d) of
     the Exchange Act (other than (x) the Company or (y) Donald R. Horton,
     Terrill J. Horton, or their respective wives, children, grandchildren and
     other descendants, or any trust or other entity formed or controlled by any
     of such individuals)) becomes the "beneficial owner" (as defined in Rule
     13d-3 under the Exchange Act) of Common Equity of the Company representing
     more than 50% of the voting power of the Common Equity of the Company;

          (3)   Continuing Directors cease to constitute at least a majority of
     the Board of Directors of the Company; or

          (4)   the stockholders of the Company approve any plan or proposal for
     the liquidation or dissolution of the Company; provided, however, that a
                                                    --------  -------
     liquidation or dissolution of the Company which is part of a transaction
     that does not constitute a Fundamental Change under the proviso contained
     in clause (1) above shall not constitute a Fundamental Change.

A Fundamental Change will not be deemed to have occurred, however, if either:
(I) the Sale Price for (a) any 10 Trading Days within the 20 consecutive Trading
Days ending immediately before the Fundamental Change, and (b) at least five
Trading Days within the 10 consecutive Trading Days ending immediately before
the Fundamental Change shall equal or exceed 105% of the Accreted Value divided
by the Conversion Rate, or (II) both (a) at least 90% of the consideration
(excluding cash payments for fractional shares) in the transaction or
transactions
<PAGE>

                                      -14-

constituting the Fundamental Change consists of shares of Common Equity with
full voting rights traded on a national securities exchange or quoted on the
NASDAQ National Market (or which will be so traded or quoted when issued or
exchanged in connection with such Fundamental Change) (such securities being
referred to as "Publicly Traded Securities") and as a result of such transaction
                --------------------------
or transactions the Notes become convertible solely into such Publicly Traded
Securities and (b) the consideration in the transaction or transactions
constituting the Fundamental Change consists of cash, Publicly Traded Securities
or a combination of cash and Publicly Traded Securities with an aggregate fair
market value (which, in the case of Publicly Traded Securities, shall be equal
to the average closing price of such Publicly Traded Securities during the five
consecutive Trading Days commencing with the Trading Day following consummation
of the transaction or transactions constituting the Fundamental Change) of at
least 105% of the Accreted Conversion Price.

          "Fundamental Change Purchase Date" has the meaning provided in Section
           --------------------------------
4.02(a).

          "Fundamental Change Purchase Notice" has the meaning provided in
           ----------------------------------
Section 4.02(b).

          "Fundamental Change Purchase Price" has the meaning provided in
           ---------------------------------
Section 4.02(a).

          "GAAP" means generally accepted accounting principles set forth in the
           ----
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as may be approved by a significant segment of the accounting
profession of the United States, as in effect on the date of this Supplemental
Indenture.

          "Guarantors" means, (i) initially, each of:
           ----------

              C. Richard Dobson Builders, Inc., a Virginia corporation;

              CH Investments of Texas, Inc., a Delaware corporation;

              CHI Construction Company, an Arizona corporation;

              CHTEX of Texas, Inc., a Delaware corporation;

              Continental Homes, Inc., a Delaware corporation;

              Continental Homes of Florida, Inc., a Florida corporation;
<PAGE>

                                      -15-

              Continental Homes of Texas, L.P., a Texas limited partnership
              (formerly Continental Homes of Austin, L.P.);

              Continental Residential, Inc., a California corporation;

              D.R. Horton, Inc.-Birmingham, an Alabama corporation;

              D.R. Horton, Inc.-Chicago, a Delaware corporation;

              D.R. Horton, Inc.-Denver, a Delaware corporation;

              D.R. Horton, Inc.-Greensboro, a Delaware corporation;

              D.R. Horton, Inc.-Jacksonville, a Delaware corporation (formerly
              D.R. Horton, Inc.-San Diego);

              D.R. Horton, Inc.-Louisville, a Delaware corporation;

              D.R. Horton, Inc.-Minnesota, a Delaware corporation;

              D.R. Horton, Inc.-New Jersey, a Delaware corporation;

              D.R. Horton, Inc.-Portland, a Delaware corporation;

              D.R. Horton, Inc.-Sacramento, a California corporation;

              D.R. Horton, Inc.-Texas, Ltd., a Texas limited partnership;

              D.R. Horton, Inc.-Torrey, a Delaware corporation;

              D.R. Horton Los Angeles Holding Company, Inc., a California
              corporation;

              D.R. Horton Management Company, Ltd., a Texas limited partnership;

              D.R. Horton San Diego Holding Company, Inc., a California
              corporation;

              D.R. Horton Cambridge Homes, LLC, a Delaware limited liability
              company;

              DRH Cambridge Homes, Inc., a California corporation (formerly D.R.
              Horton Sacramento Management Company, Inc.);

              DRH Construction, Inc., a Delaware corporation;
<PAGE>

                                      -16-

              DRH Regrem I, Inc., a Delaware corporation;

              DRH Regrem II, Inc., a Delaware corporation;

              DRH Regrem III, Inc., a Delaware corporation;

              DRH Regrem IV, Inc., a Delaware corporation;

              DRH Regrem V, Inc., a Delaware corporation;

              DRH Regrem VI, LP, a Texas limited partnership;

              DRH Regrem VII, LP,  Texas limited partnership;

              DRH Regrem VIII, LLC, a Delaware limited liability company;

              DRH Southwest Construction, Inc., a California corporation;

              DRH Title Company of Colorado, Inc., a Colorado corporation;

              DRH Tucson Construction, Inc., a Delaware corporation;

              DRHI, Inc., a Delaware corporation;

              KDB Homes, Inc., a Delaware corporation;

              Meadows I, Ltd., a Delaware corporation;

              Meadows II, Ltd., a Delaware corporation;

              Meadows VIII, Ltd., a Delaware corporation;

              Meadows IX, Inc., a New Jersey corporation;

              Meadows X, Inc., a New Jersey corporation;

              SGS Communities at Grande Quay LLC, a New Jersey limited liability
              company; and

(ii) each of the Company's Subsidiaries which becomes a guarantor of the Notes
pursuant to the provisions of the Indenture.  An Unrestricted Subsidiary may
become a Guarantor if it (x) is so designated by resolution of the Board of
Directors of the Company and (y) executes a supplemental indenture satisfactory
to the Trustee.
<PAGE>

                                      -17-

          "Holder" means the Person in whose name a Note is registered in the
           ------
books of the Registrar for the Notes.

          "incurrence" has the meaning set forth in Section 3.01.
           ----------

          "Indebtedness" of any Person means, without duplication, (i) any
           ------------
liability of such Person (a) for borrowed money or under any reimbursement
obligation relating to a letter of credit or other similar instruments (other
than standby letters of credit or similar instrument issued for the benefit of
or surety, performance, completion or payment bonds, earnest money notes or
similar purpose undertakings or indemnifications issued by, such Person in the
ordinary course of business), (b) evidenced by a bond, note, debenture or
similar instrument (including a purchase money obligation) given in connection
with the acquisition of any businesses, properties or assets of any kind or with
services incurred in connection with capital expenditures (other than any
obligation to pay a contingent purchase price which, as of the date of
incurrence thereof is not required to be recorded as a liability in accordance
with GAAP), or (c) in respect of Capitalized Lease Obligations (to the extent of
the Attributable Debt in respect thereof), (ii) any Indebtedness of others that
such Person has guaranteed to the extent of the guarantee, (iii) to the extent
not otherwise included, the obligations of such Person under Currency Agreements
or Interest Protection Agreements to the extent recorded as liabilities not
constituting Interest Incurred, net of amounts recorded as assets in respect of
such agreements, in accordance with GAAP, and (iv) all Indebtedness of others
secured by a Lien on any asset of such Person, whether or not such Indebtedness
is assumed by such Person; provided, that Indebtedness shall not include
                           --------
accounts payable, liabilities to trade creditors of such Person or other accrued
expenses arising in the ordinary course of business.  The amount of Indebtedness
of any Person at any date shall be (a) the outstanding balance at such date of
all unconditional obligations as described above, net of any unamortized
discount to be accounted for as Interest Expense, in accordance with GAAP, (b)
the maximum liability of such Person for any contingent obligations under clause
(ii) above at such date, net of, any unamortized discount to be accounted for as
Interest Expense in accordance with GAAP and (c) in the case of clause (iv)
above, the lesser of (1) the fair market value of any asset subject to a Lien
securing the Indebtedness of others on the date that the Lien attaches and (2)
the amount of the Indebtedness secured.

          "Indenture" has the meaning provided in the Recitals.
           ---------

          "Intangible Assets" of the Company means all unamortized debt discount
           -----------------
and expense, unamortized deferred charges, goodwill, patents, trademarks,
service marks, trade names, copyrights, writeups of assets over their prior
carrying value (other than write-ups which occurred prior to the Issue Date and
other than, in connection with the acquisition of an asset, the write-up of the
value of such asset (within one year of its acquisition) to its fair market
value in accordance with GAAP) and all other items which would be treated as
intangibles on the consolidated balance sheet of the Company and the Restricted
Subsidiaries prepared in accordance with GAAP.
<PAGE>

                                      -18-

          "Interest Expense" of any Person for any period means, without
           ----------------
duplication, the aggregate amount of (i) interest which, in conformity with
GAAP, would be set opposite the caption "interest expense" or any like caption
on an income statement for such Person (including, without limitation, imputed
interest included in Capitalized Lease Obligations, all commissions, discounts
and other fees and charges owed with respect to letters of credit and bankers'
acceptance financing, the net costs (but reduced by net gains) associated with
Currency Agreements and Interest Protection Agreements, amortization of other
financing fees and expenses, the interest portion of any deferred payment
obligation, amortization of discount or premium, if any, and all other noncash
interest expense other than interest and other charges amortized to cost of
sales), and (ii) all interest actually paid by the Company or a Restricted
Subsidiary under any guarantee of Indebtedness (including, without limitation, a
guarantee of principal, interest or any combination thereof) of any Person other
than the Company or any Restricted Subsidiary during such period; provided, that
                                                                  --------
Interest Expense shall exclude any expense associated with the complete write-
off of financing fees and expenses in connection with the repayment of any
Indebtedness.

          "Interest Incurred" of any Person for any period means, without
           -----------------
duplication, the aggregate amount of (i) Interest Expense and (ii) all
capitalized interest and amortized debt issuance costs.

          "Interest Payment Date" has the meaning specified in Section 4.08
           ---------------------

          "Interest Protection Agreement" of any Person means any interest rate
           -----------------------------
swap agreement, interest rate collar agreement, option or futures contract or
other similar agreement or arrangement designed to protect such Person or any of
its Subsidiaries against fluctuations in interest rates with respect to
Indebtedness permitted to be incurred under this Supplemental Indenture.

          "Investment Grade" shall mean BBB  or higher by S&P or Baa3 or higher
           ----------------
by Moody's or the equivalent of such ratings by S&P or Moody's.

          "Investments" of any Person means (i) all investments by such Person
           -----------
in any other Person in the form of loans, advances or capital contributions,
(ii) all guarantees of Indebtedness or other obligations of any other Person by
such Person, (iii) all purchases (or other acquisitions for consideration) by
such Person of Indebtedness, Capital Stock or other securities of any other
Person and (iv) all other items that would be classified as investments in any
other Person (including, without limitation, purchases of assets outside the
ordinary course of business) on a balance sheet of such Person prepared in
accordance with GAAP.

          "Issue Date" means the date on which the Notes are originally issued
           ----------
under this Supplemental Indenture.
<PAGE>

                                      -19-

          "Issue Price" of any Note means, in connection with the original
           -----------
issuance of such Note, the initial issue price at which the Note is issued as
set forth on the face of the Note.

          "Lien" means, with respect to any Property, any mortgage, lien,
           ----
pledge, charge, security interest or encumbrance of any kind in respect of such
Property.  For purposes of this definition, a Person shall be deemed to own,
subject to a Lien, any Property which it has acquired or holds subject to the
interest of a vendor or lessor under any conditional sale agreement, capital
lease or other title retention agreement relating to such Property.

          "Market Price" means the average of the Sale Prices of the Common
           ------------
Stock for the 20 Trading Day period ending on the third Business Day (if the
third Business Day prior to the applicable date is a Trading Day, or if not,
then on the last Trading Day prior to such third Business Day) prior to the
applicable date, appropriately adjusted to take into account the occurrence,
during the period commencing on the first of such Trading Days during such 20
Trading Day period and ending on such date, of certain events with respect to
the Common Stock that would result in an adjustment of the Conversion Rate under
this Supplemental Indenture.

          "Marketable Securities" means (a) equity securities that are listed on
           ---------------------
the New York Stock Exchange, the American Stock Exchange or The Nasdaq National
Market and (b) debt securities that are rated by a nationally recognized rating
agency, listed on the New York Stock Exchange or the American Stock Exchange or
covered by at least two reputable market makers.

          "Moody's" means Moody's Investors Service, Inc. or any successor to
           -------
its debt rating business.

          "Mortgage Subsidiary" means any Subsidiary of the Company
           -------------------
substantially all of whose operations consist of the mortgage lending business.

          "Net Cash Proceeds" means, with respect to an Asset Disposition, cash
           -----------------
payments received (including any cash payments received by way of deferred
payment of principal pursuant to a note or installment receivable or otherwise
(including any cash received upon sale or disposition of such note or
receivable), but only as and when received), excluding any other consideration
received in the form of assumption by the acquiring Person of Indebtedness or
other obligations relating to the Property disposed of in such Asset Disposition
or received in any other non-cash form unless and until such non-cash
consideration is converted into cash therefrom, in each case, net of all legal,
title and recording tax expenses, commissions and other fees and expenses
incurred, and all federal, state and local taxes required to be accrued as a
liability under GAAP as a consequence of such Asset Disposition, and in each
case net of a reasonable reserve for the after-tax cost of any indemnification
or other payments (fixed and contingent) attributable to the seller's
indemnities or other obligations to the pur-
<PAGE>

                                      -20-

chaser undertaken by the Company or any of its Restricted Subsidiaries in
connection with such Asset Disposition, and net of all payments made on any
Indebtedness which is secured by or relates to such Property, in accordance with
the terms of any Lien or agreement upon or with respect to such Property or
which must by its terms or by applicable law be repaid out of the proceeds from
such Asset Disposition, and net of all contractually required distributions and
payments made to minority interest holders in Restricted Subsidiaries or joint
ventures as a result of such Asset Disposition.

          "Non-Recourse Indebtedness" with respect to any Person means
           -------------------------
Indebtedness of such Person for which (i) the sole legal recourse for collection
of principal and interest on such Indebtedness is against the specific property
identified in the instruments evidencing or securing such Indebtedness and such
property was acquired with the proceeds of such Indebtedness or such
Indebtedness was incurred within 90 days after the acquisition of such property
and (ii) no other assets of such Person may be realized upon in collection of
principal or interest on such Indebtedness.  Indebtedness which is otherwise
Non-Recourse Indebtedness will not lose its character as Non-Recourse
Indebtedness because there is recourse to the borrower, any guarantor or any
other Person for (i) environmental warranties and indemnities, or (ii)
indemnities for and liabilities arising from fraud, misrepresentation,
misapplication or non-payment of rents, profits, insurance and condemnation
proceeds and other sums actually received by the borrower from secured assets to
be paid to the lender, waste and mechanics' liens.

          "Note Price" has the meaning assigned thereto in Exhibit A hereto.
           ----------

          "Notes" has the meaning provided in the Recitals.
           -----

          "Option Exercise Date" has the meaning specified in Section 4.08.
           --------------------

          "Paying Agent" means the Trustee or any successor paying agent.
           ------------

          "Permitted Indebtedness" means (i) Indebtedness under Credit
           ----------------------
Facilities which does not exceed $1 billion principal amount outstanding at any
one time; (ii) Indebtedness in respect of obligations of the Company and its
Subsidiaries to the trustees under indentures for debt securities; (iii) inter-
company debt obligations of the Company to any Restricted Subsidiary and of any
Restricted Subsidiary to the Company or any other Restricted Subsidiary;
provided, however, that any Indebtedness of any Restricted Subsidiary or the
--------  -------
Company owed to any Restricted Subsidiary or that ceases to be a Restricted
Subsidiary shall be deemed to be incurred and shall be treated as an incurrence
for purposes of Section 3.01(a) at the time the Restricted Subsidiary in
question ceases to be a Restricted Subsidiary; (iv) Indebtedness of the Company
or any Restricted Subsidiary under any Currency Agreements or Interest
Protection Agreements in a notional amount no greater than the payments due (at
the time the related Currency Agreement or Interest Protection Agreement is
entered into) with respect to the Indebtedness or cur-
<PAGE>

                                      -21-

rency being hedged; (v) Purchase Money Indebtedness; (vi) Capitalized Lease
Obligations; (vii) obligations for, pledges of assets in respect of, and
guaranties of, bond financings of political subdivisions or enterprises thereof
in the ordinary course of business; (viii) Indebtedness secured only by office
buildings owned or occupied by the Company or any Restricted Subsidiary, which
Indebtedness does not exceed $20 million aggregate principal amount outstanding
at any one time; (ix) Indebtedness under warehouse lines of credit, repurchase
agreements and Indebtedness secured by mortgage loans and related assets of
mortgage lending Subsidiaries in the ordinary course of a mortgage lending
business; and (x) Indebtedness of the Company or any Restricted Subsidiary
which, together with all other Indebtedness under this clause (x), does not
exceed $30 million aggregate principal amount outstanding at any one time.

          "Permitted Investment" means (i) Cash Equivalents; (ii) any Investment
           --------------------
in the Company or any Restricted Subsidiary or any Person that becomes a
Restricted Subsidiary as a result of such Investment or that is consolidated or
merged with or into, or transfers all or substantially all of the assets of it
or an operating unit or line of business to, the Company or a Restricted
Subsidiary; (iii) any receivables, loans or other consideration taken by the
Company or any Restricted Subsidiary in connection with any asset sale otherwise
permitted by the Indenture; (iv) Investments received in connection with any
bankruptcy or reorganization proceeding, or as a result of foreclosure,
perfection or enforcement of any Lien or any judgment or settlement of any
Person in exchange for or satisfaction of Indebtedness or other obligations or
other property received from such Person, or for other liabilities or
obligations of such Person created, in accordance with the terms of the
Indenture; (v) Investments in Currency Agreements or Interest Protection
Agreements described in the definition of Permitted Indebtedness; (vi) any loan
or advance to an executive officer or director of the Company or any Restricted
Subsidiary made in the ordinary course of business; provided, however, that any
                                                    --------  -------
such loan or advance exceeding $1 million shall have been approved by the Board
of Directors of the Company or a committee thereof consisting of disinterested
members; (vii) Investments in joint ventures in a Real Estate Business with
unaffiliated third parties in an aggregate amount at any time outstanding not to
exceed 10% of Consolidated Tangible Assets at such time; (viii) Investments in
interests in issuances of collateralized mortgage obligations, mortgages,
mortgage loan securities or other mortgage related assets; and (ix) Investments
in an aggregate amount outstanding not to exceed $100 million.

          "Permitted Liens" means (i) Liens for taxes, assessments or
           ---------------
governmental or quasi-government charges or claims that (a) are not yet
delinquent, (b) are being contested in good faith by appropriate proceedings and
as to which appropriate reserves have been established or other provisions have
been made in accordance with GAAP, if required, or (c) encumber solely property
abandoned or in the process of being abandoned, (ii) statutory Liens of
landlords and carriers', warehousemen's, mechanics', suppliers', materialmen's,
repairmen's or other Liens imposed by law and arising in the ordinary course of
business and with respect to amounts that, to the extent applicable, either (a)
are not yet delinquent or
<PAGE>

                                      -22-

(b) are being contested in good faith by appropriate proceedings and as to which
appropriate reserves have been established or other provisions have been made in
accordance with GAAP, if required, (iii) Liens (other than any Lien imposed by
the Employee Retirement Income Security Act of 1974, as amended) incurred or
deposits made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of social security, (iv)
Liens incurred or deposits made to secure the performance of tenders, bids,
leases, statutory obligations, surety and appeal bonds, development obligations,
progress payments, government contacts, utility services, developer's or other
obligations to make on-site or off-site improvements and other obligations of
like nature (exclusive of obligations for the payment of borrowed money but
including the items referred to in the parenthetical in clause (i)(a) of the
definition of "Indebtedness"), in each case incurred in the ordinary course of
business of the Company and the Restricted Subsidiaries, (v) attachment or
judgment Liens not giving rise to a Default or an Event of Default, (vi)
easements, dedications, assessment district or similar liens in connection with
municipal or special district financing, rights-of-way, restrictions,
reservations, other similar charges, burdens, and other similar charges or
encumbrances not materially interfering with the ordinary course of business of
the Company and the Restricted Subsidiaries, (vii) zoning restrictions,
licenses, restrictions on the use of real property or minor irregularities in
title thereto, which do not materially impair the use of such real property in
the ordinary course of business of the Company and the Restricted Subsidiaries,
(viii) Liens securing Indebtedness incurred pursuant to clause (viii) or (ix) of
the definition of Permitted Indebtedness, (ix) Liens securing Indebtedness of
the Company or any Restricted Subsidiary permitted to be incurred under the
Indenture; provided, that the aggregate amount of all consolidated Indebtedness
           --------
of the Company and the Restricted Subsidiaries (including, with respect to
Capitalized Lease Obligations, the Attributable Debt in respect thereof) secured
by Liens (other than Non-Recourse Indebtedness and Indebtedness incurred
pursuant to clause (ix) of the definition of Permitted Indebtedness) shall not
exceed 40% of Consolidated Adjusted Tangible Assets at any one time outstanding
(after giving effect to the incurrence of such Indebtedness and the use of the
proceeds thereof), (x) Liens securing Non-Recourse Indebtedness of the Company
or any Restricted Subsidiary; provided, that such Liens apply only to the
                              --------
property financed out of the net proceeds of such Non-Recourse Indebtedness
within 90 days after the incurrence of such Non-Recourse Indebtedness, (xi)
Liens securing Purchase Money Indebtedness; provided that such Liens apply only
                                            --------
to the property acquired, constructed or improved with the proceeds of such
Purchase Money Indebtedness within 90 days after the incurrence of such Purchase
Money Indebtedness, (xii) Liens on property or assets of the Company or any
Restricted Subsidiary securing Indebtedness of the Company or any Restricted
Subsidiary owing to the Company or one or more Restricted Subsidiaries, (xiii)
leases or subleases granted to others not materially interfering with the
ordinary course of business of the Company and the Restricted Subsidiaries,
(xiv) purchase money security interests (including, without limitation,
Capitalized Lease Obligations); provided, that such Liens apply only to the
                                --------
Property acquired and the related Indebtedness is incurred within 90 days after
the acquisition of such Property, (xv) any right of first refusal, right of
first offer, option, contract or other agreement to sell an asset; provided,
                                                                   --------
that such sale
<PAGE>

                                      -23-

is not otherwise prohibited under the Indenture, (xvi) any right of a lender or
lenders to which the Company or a Restricted Subsidiary may be indebted to
offset against, or appropriate and apply to the payment of such, Indebtedness
any and all balances, credits, deposits, accounts or money of the Company or a
Restricted Subsidiary with or held by such lender or lenders or its Affiliates,
(xvii) any pledge or deposit of cash or property in conjunction with obtaining
surety, performance, completion or payment bonds and letters of credit or other
similar instruments or providing earnest money obligations, escrows or similar
purpose undertakings or indemnifications in the ordinary course of business of
the Company and its Restricted Subsidiaries, (xviii) Liens for homeowner and
property owner association developments and assessments, (xix) Liens securing
Refinancing Indebtedness; provided, that such Liens extend only to the assets
                          --------
securing the Indebtedness being refinanced, and (xx) Liens incurred in the
ordinary course of business as security for the obligations of the Company and
its Restricted Subsidiaries with respect to indemnification in respect of title
insurance providers.

          "Person" means any individual, corporation, partnership, limited
           ------
liability company, joint venture, incorporated or unincorporated association,
joint stock company, trust, unincorporated organization or government or any
agency or political subdivision thereof.

          "Preferred Stock" of any Person means all Capital Stock of such Person
           ---------------
which has a preference in liquidation or with respect to the payment of
dividends.

          "Principal Amount" of a Note means the principal amount of such Note
           ----------------
at Final Maturity.

          "Property" of any Person means all types of real, personal, tangible,
           --------
intangible or mixed property owned by such Person, whether or not included in
the most recent consolidated balance sheet of such Person and its Subsidiaries
under GAAP.

          "Publicly Traded Securities" has the meaning provided in the
           --------------------------
definition of "Fundamental Change."

          "Purchase Date" has the meaning provided in Section 4.03.
           -------------

          "Purchase Money Indebtedness" means Indebtedness of the Company or any
           ---------------------------
Restricted Subsidiary incurred for the purpose of financing all or any part of
the purchase
<PAGE>

                                      -24-

price, or the cost of construction or improvement, of any property to be used in
the ordinary course of business by the Company and the Restricted Subsidiaries;
provided, however, that (i) the aggregate principal amount of such Indebtedness
--------  -------
shall not exceed such purchase price or cost and (ii) such Indebtedness shall be
incurred no later than 90 days after the acquisition of such property or
completion of such construction or improvement.

          "Purchase Notice" has the meaning provided in Section 4.03.
           ---------------

          "Purchase Price" has the meaning provided in Section 4.03.
           --------------

          "Purchased Shares" has the meaning provided in Section 4.06.
           ----------------

          "Qualified Stock" means Capital Stock of the Company other than
           ---------------
Disqualified Stock.

          "Rating Agencies" shall mean (1) S&P and (2) Moody's.
           ---------------

          "Real Estate Business" means homebuilding, housing construction, real
           --------------------
estate development or construction and related real estate activities, including
the provision of mortgage financing or title insurance.

          "Record Date" means, with respect to any dividend, distribution or
           -----------
other transaction or event in which the holders of Common Stock have the right
to receive any cash, securities or other property or in which the Common Stock
(or other applicable security) is exchanged for or converted into any
combination of cash, securities or other property, the date fixed for
determination of shareholders entitled to receive such cash, securities or other
property (whether such date is fixed by the Board of Directors or by statute,
contract or otherwise).

          "Redemption Date" when used with respect to any Note to be redeemed,
           ---------------
means the date fixed for such redemption by or pursuant to this Supplemental
Indenture.

          "Redemption Price" when used with respect to any Note to be redeemed,
           ----------------
means the price at which it is to be redeemed pursuant to this Supplemental
Indenture.

          "Refinancing Indebtedness" means Indebtedness (to the extent not
           ------------------------
Permitted Indebtedness) that refunds, refinances or extends any Indebtedness of
the Company or any Restricted Subsidiary (to the extent not Permitted
Indebtedness) outstanding on the Issue Date or other Indebtedness (to the extent
not Permitted Indebtedness) permitted to be incurred by the Company or any
Restricted Subsidiary pursuant to the terms of this Indenture, but only to the
extent that (i) the Refinancing Indebtedness is subordinated to the Notes or the
Guarantees, as the case may be, to the same extent as the Indebtedness being
refunded, refinanced or extended, if at all, (ii) the Refinancing Indebtedness
is scheduled to mature either (a) no earlier than the Indebtedness being
refunded, refinanced or extended or (b) after the maturity date
<PAGE>

                                      -25-

of the Notes, (iii) the portion, if any, of the Refinancing Indebtedness that is
scheduled to mature on or prior to the maturity date of the Notes has a Weighted
Average Life to Maturity at the time such Refinancing Indebtedness is incurred
that is equal to or greater than the Weighted Average Life to Maturity of the
portion of the Indebtedness being refunded, refinanced or extended that is
scheduled to mature on or prior to the maturity date of the Notes, and (iv) such
Refinancing Indebtedness is in an aggregate principal amount that is equal to or
less than the aggregate principal amount then outstanding under the Indebtedness
being refunded, refinanced or extended.

          "Registrar" means the American Stock Transfer & Trust Company or any
           ---------
successor registrar of the Notes.

          "Regular Record Date" has the meaning specified in Section 4.08.
           -------------------

          "Restated Principal Amount" has the meaning specified in Section 4.08.
           -------------------------

          "Restricted Payment" means any of the following:  (i) the declaration
           ------------------
or payment of any dividend or any other distribution on Capital Stock of the
Company or any Restricted Subsidiary or any payment made to the direct or
indirect holders (in their capacities as such) of Capital Stock of the Company
or any Restricted Subsidiary (other than (a) dividends or distributions payable
solely in Qualified Stock and (b) in the case of Restricted Subsidiaries,
dividends or distributions payable to the Company or to a Restricted
Subsidiary); (ii) the purchase, redemption or other acquisition or retirement
for value of any Capital Stock of the Company or any Restricted Subsidiary
(other than a payment made to the Company or any Restricted Subsidiary); and
(iii) any Investment (other than any Permitted Investment), including any
Investment in an Unrestricted Subsidiary (including by the designation of a
Subsidiary of the Company as an Unrestricted Subsidiary).

          "Restricted Subsidiary" means any Subsidiary of the Company which is
           ---------------------
not an Unrestricted Subsidiary.

          "S&P" means Standard and Poor's Ratings Group or any successor to its
           ---
debt rating business.

          "Sale Price" of the Common Stock on any date means the closing sale
           ----------
price per share (or, if no closing sale price is reported, the average of the
bid and ask prices or, if more than one in either case, the average of the
average bid and average ask prices) on such date as reported in the composite
transactions for the principal United States securities exchange on which the
Common Stock is traded or, if the Common Stock is not listed on a United States
national or regional securities exchange, as reported by the National
Association of Securities Dealers Automated Quotation System.

          "Significant Subsidiary" means any Subsidiary of the Company which
           ----------------------
would constitute a "significant subsidiary" as defined in Rule 1-02 of
Regulation S-X under the Securities Act and the Exchange Act.
<PAGE>

                                      -26-

          "Special Record Date" has the meaning specified in Section 4.10.
           -------------------

          "Stated Maturity", when used with respect to any Note or any
           ---------------
installment of semi-annual or contingent interest thereon, means the date
specified in such Note as the fixed date on which an amount equal to the
Principal Amount of such Note or such installment of semi-annual or contingent
interest is due and payable.

          "Subsidiary" of any Person means any corporation or other entity of
           ----------
which a majority of the Capital Stock having ordinary voting power to elect a
majority of the Board of Directors or other persons performing similar functions
is at the time directly or indirectly owned or controlled by such Person.

          "Successor" has the meaning set forth in Section 3.07.
           ---------

          "Supplemental Indenture" has the meaning provided in the Preamble.
           ----------------------

          "Tax Event" means that the Company shall have received an opinion from
           ---------
independent tax counsel experienced in such matters to the effect that, on or
after May 4, 2001, as a result of (a) any amendment to, or change (including any
announced prospective change) in, the laws (or any regulations thereunder) of
the United States or any political subdivision or taxing authority thereof or
therein or (b) any amendment to, or change in, an interpretation or application
of such laws, rules or regulations by any legislative body, court, governmental
agency or regulatory authority, in each case which amendment or change is
enacted, promulgated, issued or announced or which interpretation is issued or
announced or which action is taken, on or after May 4, 2001, there is more than
an insubstantial risk that interest (including original issue discount and
contingent interest, if any) payable on the Notes either (i) would not be
deductible on a current accrual basis or (ii) would not be deductible under any
other method, in either case in whole or in part, by the Company (by reason of
deferral, disallowance, or otherwise) for United States Federal income tax
purposes.

          "Tax Event Date" has the meaning specified in Section 4.08.
           --------------

          "Trading Day" means (x) if the applicable security is listed or
           -----------
admitted for trading on the New York Stock Exchange, the NASDAQ National Market
or another national security exchange, a day on which the New York Stock
Exchange, the NASDAQ National Market or another national security exchange is
open for business or (y) if the applicable security is quoted on the NASDAQ
National Market, a day on which trades may be made thereon or (z) if the
applicable security is not so listed, admitted for trading or quoted, any day
other than a Saturday or Sunday or a day on which banking institutions in the
State of New York are authorized or obligated by law or executive order to
close.

          "Trustee" means the party named as such above until a successor
           -------
replaces such party in accordance with the applicable provisions of this
Indenture and thereafter means the successor serving hereunder.
<PAGE>

                                      -27-

          "Twenty-Day Average Price" means the average of the Sale Prices of the
           ------------------------
Common Stock for each Trading Day in the 20 Trading Day period ending on the
last Trading Day prior to the applicable Conversion Date, appropriately adjusted
to take into account the occurrence, during such 20 Trading Day period, of any
event requiring adjustment of the Conversion Rate under this Supplemental
Indenture.

          "Underwriting Agreement" means that certain underwriting agreement by
           ----------------------
and among D.R. Horton, Inc., the Guarantors party thereto and Salomon Smith
Barney Inc. dated as of May 4, 2001.


          "Unrestricted Subsidiary" means any Subsidiary of the Company so
           -----------------------
designated by a resolution adopted by the Board of Directors of the Company or a
duly authorized committee thereof as provided below; provided that (a) the
                                                     --------
holders of Indebtedness thereof do not have direct or indirect recourse against
the Company or any Restricted Subsidiary, and neither the Company nor any
Restricted Subsidiary otherwise has liability, for any payment obligations in
respect of such Indebtedness (including any undertaking, agreement or instrument
evidencing such Indebtedness), except, (i) in each case, to the extent that the
amount thereof constitutes a Restricted Payment permitted by the Indenture, (ii)
in the case of Non-Recourse Indebtedness, to the extent such recourse or
liability is for the matters discussed in the last sentence of the definition of
"Non-Recourse Indebtedness," or (iii) to the extent such Indebtedness is a
guarantee by such Subsidiary of Indebtedness of the Company or a Restricted
Subsidiary and (b) no holder of any Indebtedness of such Subsidiary shall have a
right to declare a default on such Indebtedness or cause the payment thereof to
be accelerated or payable prior to its stated maturity as a result of a default
on any Indebtedness of the Company or any Restricted Subsidiary.  Subject to the
foregoing, the Board of Directors of the Company or a duly authorized committee
thereof may designate any Subsidiary to be an Unrestricted Subsidiary; provided,
                                                                       --------
however, that (i) the net amount (the "Designation Amount") then outstanding of
-------                                ------------------
all previous Investments by the Company and the Restricted Subsidiaries in such
Subsidiary will be deemed to be a Restricted Payment at the time of such
designation and will reduce the amount available for Restricted Payments under
Section 3.02 hereof, to the extent provided therein, (ii) the Company must be
permitted under Section 3.02 hereof to make the Restricted Payment deemed to
have been made pursuant to clause (i), and (iii) after giving effect to such
designation, no Default or Event of Default shall have occurred and be
continuing.  In accordance with the foregoing, and not in limitation thereof,
Investments made by any Person in any Subsidiary of such Person prior to such
Person's merger with the Company or any Restricted Subsidiary (but not in
contemplation or anticipation of such merger) shall not be counted as an
Investment by the Company or such Restricted Subsidiary if such Subsidiary of
such Person is designated as an Unrestricted Subsidiary.  The Board of Directors
of the Company or a duly authorized committee thereof may also redesignate an
Unrestricted Subsidiary to be a Restricted Subsidiary; provided, however, that
                                                       --------  -------
(i) the Indebtedness of such Unrestricted Subsidiary as of the date of such
redesignation could then be incurred under Section 3.01 hereof and (ii)
immediately after giving effect to such redesignation and the incurrence of any
such additional Indebtedness, the Company and the Restricted Subsidiaries could
incur $1.00 of additional Indebtedness under Section 3.01(a) hereof.  Any such
designation or redesignation by the Board of Directors of the Company or a
committee thereof will be evidenced to the Trustee by the filing with the
Trustee of a certified copy of the resolution of the
<PAGE>

                                      -28-


Board of Directors of the Company or a committee thereof will be evidenced to
the Trustee by the filing with the Trustee of a certified copy of the resolution
of the Board of Directors of the Company or a committee thereof giving effect to
such designation or redesignation and an Officers' Certificate certifying that
such designation or redesignation complied with the foregoing conditions and
setting forth the underlying calculations of such Officers' Certificate. The
designation of any Person as an Unrestricted Subsidiary shall be deemed to
include a designation of all Subsidiaries of such Person as Unrestricted
Subsidiaries; provided, however, that the ownership of the general partnership
              --------  -------
interest (or a similar member's interest in a limited liability company) by an
Unrestricted Subsidiary shall not cause a Subsidiary of the Company of which
more than 95% of the equity interest is held by the Company or one or more
Restricted Subsidiaries to be deemed an Unrestricted Subsidiary.

          "Weighted Average Life to Maturity" means, when applied to any
           ---------------------------------
Indebtedness or portion thereof at any date, the number of years obtained by
dividing (i) the sum of the products obtained by multiplying (a) the amount of
each then remaining installment, sinking fund, serial maturity or other required
payment of principal, including, without limitation, payment at final maturity,
in respect thereof, by (b) the number of years (calculated to the nearest one-
twelfth) that will elapse between such date and the making of such payment by
(ii) the sum of all such payments described in clause (i)(a) above.

                                 ARTICLE THREE

                                   Covenants

Section 3.01.  Limitations on Indebtedness.
               ---------------------------

          (a) Until the Notes are rated Investment Grade by both Rating Agencies
(after which time the following covenant will no longer be in effect), the
Company will not, and will not cause or permit any Restricted Subsidiary,
directly or indirectly, to, create, incur, assume, become liable for or
guarantee the payment of (collectively, an "incurrence") any Indebtedness
                                            ----------
(including Acquired Indebtedness) unless, after giving effect thereto and the
application of the proceeds therefrom, the Consolidated Fixed Charge Coverage
Ratio on the date thereof would be at least 2.0 to 1.0.

          (b) Notwithstanding the foregoing, the provisions of this Supplemental
Indenture will not prevent the incurrence of: (i) Permitted Indebtedness, (ii)
Refinancing Indebtedness, (iii) Non-Recourse Indebtedness, (iv) any Guarantee of
Indebtedness of the Company represented by the Notes and (v) any guarantee of
Indebtedness incurred under Credit Facilities in compliance with this Indenture.

          (c) For purposes of determining compliance with this covenant, in the
event that an item of Indebtedness may be incurred through the first paragraph
of this covenant or by meeting the criteria of one or more of the types of
Indebtedness described in the second paragraph of this covenant (or the
definitions of the terms used therein), the Company, in its sole discretion, (i)
may classify such item of Indebtedness under and comply with either
<PAGE>

                                      -29-

of such paragraphs (or any of such definitions), as applicable, (ii) may
classify and divide such item of Indebtedness into more than one of such
paragraphs (or definitions), as applicable, and (iii) may elect to comply with
such paragraphs (or definitions), as applicable, in any order.

          (d) The Company will not, and will not cause or permit any Guarantor
to, directly or indirectly, in any event incur any Indebtedness that purports to
be by its terms (or by the terms of any agreement governing such Indebtedness)
subordinated to any other Indebtedness of the Company or of such Guarantor, as
the case may be, unless such Indebtedness is also by its terms (or by the terms
of any agreement governing such Indebtedness) made expressly subordinated to the
Notes or the Guarantee of such Guarantor, as the case may be, to the same extent
and in the same manner as such Indebtedness is subordinated to such other
Indebtedness of the Company or such Guarantor, as the case may be.

Section 3.02.  Limitations on Restricted Payments.
               ----------------------------------

          (a) Until the Notes are rated Investment Grade by both Rating Agencies
(after which time the following covenant will no longer be in effect), the
Company will not, and will not cause or permit any Restricted Subsidiary to,
directly or indirectly, make any Restricted Payment unless:

          (i)    no Default or Event of Default shall have occurred and be
     continuing at the time of or immediately after giving effect to such
     Restricted Payment;

          (ii)   immediately after giving effect to such Restricted Payment,
     the Company could incur at least $1.00 of Indebtedness pursuant to Section
     3.01(a) hereof; and

          (iii)  immediately after giving effect to such Restricted Payment,
     the aggregate amount of all Restricted Payments (including the Fair Market
     Value of any non-cash Restricted Payment) declared or made after the Issue
     Date does not exceed the sum of (a) 50% of the Consolidated Net Income of
     the Company on a cumulative basis during the period (taken as one
     accounting period) from and including April 1, 1998, and ending on the last
     day of the Company's fiscal quarter immediately preceding the date of such
     Restricted Payment (or in the event such Consolidated Net Income shall be a
     deficit, minus 100% of such deficit), plus (b) 100% of the aggregate net
     cash proceeds of and the fair market value of Property received by the
     Company from (1) any capital contribution to the Company after June 9, 1997
     or any issue or sale after June 9, 1997 of Qualified Stock (other than to
     any Subsidiary of the Company) and (2) the issue or sale after June 9, 1997
     of any Indebtedness or other securities of the Company convertible into or
     exercisable for Qualified Stock of the Company that have been so converted
     or exercised, as the case may be, plus (c) $86.0 million, which is equal to
     the aggregate principal amount of the Company's 6 7/8% Convertible
     Subordinated Notes due 2002 that were converted into the Company's Common
     Equity prior to the
<PAGE>

                                      -30-

     Issue Date, plus (d) in the case of the disposition or repayment of any
     Investment constituting a Restricted Payment made after the June 9, 1997,
     an amount (to the extent not included in the calculation of the
     Consolidated Net Income referred to in (a)) equal to the lesser of (x) the
     return of capital with respect to such Investment (including by dividend,
     distribution or sale of Capital Stock) and (y) the amount of such
     Investment that was treated as a Restricted Payment, in either case, less
     the cost of the disposition or repayment of such Investment (to the extent
     not included in the calculation of the Consolidated Net Income referred to
     in (a)), plus (e) with respect to any Unrestricted Subsidiary that is
     redesignated as a Restricted Subsidiary after June 9, 1997 in accordance
     with the definition of Unrestricted Subsidiary (so long as the designation
     of such Subsidiary as an Unrestricted Subsidiary was treated as a
     Restricted Payment made after June 9, 1997 and only to the extent not
     included in the calculation of the Consolidated Net Income referred to in
     (a)), an amount equal to the lesser of (x) the proportionate interest of
     the Company or a Restricted Subsidiary in an amount equal to the excess of
     (I) the total assets of such Subsidiary, valued on an aggregate basis at
     the lesser of book value and Fair Market Value thereof, over (II) the total
     liabilities of such Subsidiary, determined in accordance with GAAP, and (y)
     the Designation Amount at the time of such Subsidiary's designation as an
     Unrestricted Subsidiary, plus (f) $50 million minus (g) the aggregate
     amount of all Restricted Payments (other than Restricted Payments referred
     to in clause (C) of the immediately succeeding paragraph) made after June
     9, 1997 through the Issue Date.

          (b) Clauses (ii) and (iii) of paragraph (a) will not prohibit:  (A)
the payment of any dividend within 60 days of its declaration if such dividend
could have been made on the date of its declaration without violation of the
provisions of this Indenture; (B) the repurchase, redemption or retirement of
any shares of Capital Stock of the Company in exchange for, or out of the net
proceeds of the substantially concurrent sale (other than to a Subsidiary of the
Company) of, other shares of Qualified Stock; and (C) the purchase, redemption
or other acquisition, cancellation or retirement for value of Capital Stock, or
options, warrants, equity appreciation rights or other rights to purchase or
acquire Capital Stock, of the Company or any Subsidiary held by officers or
employees or former officers or employees of the Company or any Subsidiary (or
their estates or beneficiaries under their estates) not to exceed $20 million in
the aggregate since the Issue Date; provided, however, that each Restricted
Payment described in clauses (A) and (B) of this sentence shall be taken into
account for purposes of computing the aggregate amount of all Restricted
Payments pursuant to clause (iii) of paragraph (a).

          (c) For purposes of determining the aggregate and permitted amounts of
Restricted Payments made, the amount of any guarantee of any Investment in any
Person that was initially treated as a Restricted Payment and which was
subsequently terminated or expired, net of any amounts paid by the Company or
any Restricted Subsidiary in respect of such guarantee, shall be deducted.
<PAGE>

                                      -31-

          (d) In determining the "fair market value of Property" for purposes of
clause (iii) of paragraph (a), Property other than cash, Cash Equivalents and
Marketable Securities shall be deemed to be equal in value to the "equity value"
of the Capital Stock or other securities issued in exchange therefor.  The
"equity value" of such Capital Stock or other securities shall be equal to (i)
the number of shares of Common Equity issued in the transaction (or issuable
upon conversion or exercise of the Capital Stock or other securities issued in
the transaction) multiplied by the closing sale price of the Common Equity on
its principal market on the date of the transaction (less, in the case of
Capital Stock or other securities which require the payment of consideration at
the time of conversion or exercise, the aggregate consideration payable
thereupon) or (ii) if the Common Equity is not then traded on the New York Stock
Exchange, American Stock Exchange or Nasdaq National Market, or if the Capital
Stock or other securities issued in the transaction do not consist of Common
Equity (or Capital Stock or other securities convertible into or exercisable for
Common Equity), the value of such Capital Stock or other securities as
determined by a nationally recognized investment banking firm retained by the
Board of Directors of the Company.

Section 3.03.  Limitations on Transactions with Affiliates.
               -------------------------------------------

          (a) Until the Notes are rated Investment Grade by both Rating Agencies
(after which time the following covenant will no longer be in effect), the
Company will not, and will not cause or permit any Restricted Subsidiary to,
make any loan, advance, guarantee or capital contribution to, or for the benefit
of, or sell, lease, transfer or otherwise dispose of any property or assets to,
or for the benefit of, or purchase or lease any property or assets from, or
enter into or amend any contract, agreement or understanding with, or for the
benefit of, any Affiliate of the Company or any Affiliate of any of the
Company's Subsidiaries or any holder of 10% or more of the Common Equity of the
Company (including any Affiliates of such holders), in a single transaction or
series of related transactions (each, an "Affiliate Transaction"), except for
                                          ---------------------
any Affiliate Transaction the terms of which are at least as favorable as the
terms which could be obtained by the Company or such Restricted Subsidiary, as
the case may be, in a comparable transaction made on an arm's length basis with
Persons who are not such a holder, an Affiliate of such a holder or an Affiliate
of the Company or any of the Company's Subsidiaries.

          (b) In addition, the Company will not, and will not cause or permit
any Restricted Subsidiary to, enter into an Affiliate Transaction unless (i)
with respect to any such Affiliate Transaction involving or having a value of
more than $10 million, the Company shall have (x) obtained the approval of a
majority of the Board of Directors of the Company and (y) either obtained the
approval of a majority of the Company's disinterested directors or obtained an
opinion of a qualified independent financial advisor to the effect that such
Affiliate Transaction is fair to the Company or such Restricted Subsidiary, as
the case may be, from a financial point of view and (ii) with respect to any
such Affiliate Transaction involving or having a value of more than $50 million,
the Company shall have (x) obtained the approval of
<PAGE>

                                      -32-

a majority of the Board of Directors of the Company and (y) delivered to the
Trustee an opinion of a qualified independent financial advisor to the effect
that such Affiliate Transaction is fair to the Company or such Restricted
Subsidiary, as the case may be, from a financial point of view.

          (c) Notwithstanding the foregoing, an Affiliate Transaction will not
include (i) any contract, agreement or understanding with, or for the benefit
of, or plan for the benefit of employees of the Company or its Subsidiaries
generally (in their capacities as such) that has been approved by the Board of
Directors of the Company, (ii) Capital Stock issuances to directors, officers
and employees of the Company or its Subsidiaries pursuant to plans approved by
the stockholders of the Company, (iii) any Restricted Payment otherwise
permitted under Section 3.02, (iv) any transaction between or among the Company
and one or more Restricted Subsidiaries or between or among Restricted
Subsidiaries (provided, however, no such transaction shall involve any other
              --------  -------
Affiliate of the Company (other than an Unrestricted Subsidiary to the extent
the applicable amount constitutes a Restricted Payment permitted by this
Indenture)) and (v) any transaction between one or more Restricted Subsidiaries
and one or more Unrestricted Subsidiaries where all of the payments to, or other
benefits conferred upon, such Unrestricted Subsidiaries are substantially
contemporaneously dividended, or otherwise distributed or transferred without
charge, to the Company or a Restricted Subsidiary.

Section 3.04.  Limitations on Dispositions of Assets.
               -------------------------------------

          Until the Notes are rated Investment Grade by both Rating Agencies
(after which time the following covenant will no longer be in effect), the
Company will not, and will not cause or permit any Restricted Subsidiary to,
make any Asset Disposition unless (x) the Company (or such Restricted
Subsidiary, as the case may be) receives consideration at the time of such Asset
Disposition at least equal to the Fair Market Value thereof, and (y) not less
than 70% of the consideration received by the Company (or such Restricted
Subsidiary, as the case may be) is in the form of cash, Cash Equivalents and
Marketable Securities.  The amount of any Indebtedness (other than any
Indebtedness subordinated to the Notes) of the Company or any Restricted
Subsidiary that is actually assumed by the transferee in such Asset Disposition
shall be deemed to be consideration required by clause (y) above for purposes of
determining the percentage of such consideration received by the Company or the
Restricted Subsidiaries.  The Net Cash Proceeds of an Asset Disposition shall,
within one year, at the Company's election, (a) be used by the Company or a
Restricted Subsidiary in the business of the construction and sale of homes
conducted by the Company and the Restricted Subsidiaries or any other business
of the Company or a Restricted Subsidiary existing at the time of such Asset
Disposition or (b) to the extent not so used, be applied to make a Net Cash
Proceeds Offer for the Notes and, if the Company or a Restricted Subsidiary
elects or is required to do so, repay, purchase or redeem any other
unsubordinated Indebtedness (on a pro rata basis if the amount available for
such repayment, purchase or redemption is less than the aggregate amount of (i)
the Accreted Value of, plus accrued and unpaid interest, if any, on, the Notes
tendered in such Net Cash Proceeds Offer and

<PAGE>

                                      -33-

(ii) the lesser of the principal amount, or accreted value, of such other
unsubordinated Indebtedness, plus, in each case accrued interest to the date of
repayment, purchase or redemption) at 100% of the principal amount or Accreted
Value thereof, as the case may be, plus accrued interest to the date of
repurchase or repayment.  Notwithstanding the foregoing, (A) the Company will
not be required to apply such Net Cash Proceeds to the repurchase of Notes in
accordance with clause (b) of the preceding sentence except to the extent that
such Net Cash Proceeds, together with the aggregate Net Cash Proceeds of prior
Asset Dispositions (other than those so used) which have not been applied in
accordance with this provision and as to which no prior Net Cash Proceeds Offer
shall have been made, exceed 5% of Consolidated Tangible Assets and (B) in
connection with any Asset Disposition, the Company and the Restricted
Subsidiaries will not be required to comply with the requirements of clause (y)
of the first sentence of this paragraph to the extent that the aggregate non-
cash consideration received in connection with such Asset Disposition, together
with the sum of all non-cash consideration received in connection with all prior
Asset Dispositions that has not yet been converted into cash, does not exceed 5%
of Consolidated Tangible Assets; provided, however, that when any non-cash
                                 --------  -------
consideration is converted into cash, such cash shall constitute Net Cash
Proceeds and be subject to the preceding sentence.

Section 3.05.  Limitations on Liens.
               --------------------

          The Company will not, and will not cause or permit any Restricted
Subsidiary to, create, incur, assume or suffer to exist any Liens, other than
Permitted Liens, on any of its Property, or on any shares of Capital Stock or
Indebtedness of any Restricted Subsidiary, unless contemporaneously therewith or
prior thereto all payments due under this Indenture and the Notes are secured on
an equal and ratable basis with the obligation or liability so secured until
such time as such obligation or liability is no longer secured by a Lien.

Section 3.06.  Limitations on Restrictions Affecting Restricted Subsidiaries.
               -------------------------------------------------------------

          The Company will not, and will not cause or permit any Restricted
Subsidiary to, create, assume or otherwise cause or suffer to exist or become
effective any consensual encumbrance or restriction (other than encumbrances or
restrictions imposed by law or by judicial or regulatory action or by provisions
of leases and other agreements that restrict the assignability thereof) on the
ability of any Restricted Subsidiary to (i) pay dividends or make any other
distributions on its Capital Stock or any other interest or participation in, or
measured by, its profits, owned by the Company or any other Restricted
Subsidiary, or pay interest on or principal of any Indebtedness owed to the
Company or any other Restricted Subsidiary, (ii) make loans or advances to the
Company or any other Restricted Subsidiary, or (iii) transfer any of its
properties or assets to the Company or any other Restricted Subsidiary, except
for (a) encumbrances or restrictions existing under or by reason of applicable
law, (b) covenants or restrictions contained in Indebtedness in effect on the
date of this Indenture as such covenants or restrictions are in effect on such
date, (c) any restrictions or encum-
<PAGE>

                                      -34-

brances arising under Acquired Indebtedness; provided, that such encumbrance or
                                             --------
restriction applies only to either the assets that were subject to the
restriction or encumbrance at the time of the acquisition or the obligor on such
Indebtedness and its Subsidiaries, (d) any restrictions or encumbrances arising
in connection with Refinancing Indebtedness; provided, however, that any
                                             --------  -------
restrictions and encumbrances of the type described in this clause (d) that
arise under such Refinancing Indebtedness shall not be materially more
restrictive than those under the agreement creating or evidencing the
Indebtedness being refunded, refinanced, replaced or extended, (e) any Permitted
Lien, or any other agreement restricting the sale or other disposition of
property, securing Indebtedness permitted by this Indenture if such Permitted
Lien or agreement does not expressly restrict the ability of a Subsidiary of the
Company to pay dividends or make or repay loans or advances prior to default
thereunder, (f) reasonable and customary borrowing base covenants set forth in
agreements evidencing Indebtedness otherwise permitted by this Indenture, (g)
customary provisions restricting subletting or assignment of any lease governing
a leasehold interest of the Company or any Restricted Subsidiary, and (h) any
restriction with respect to a Restricted Subsidiary imposed pursuant to an
agreement entered into for the sale or disposition of all or substantially all
of the Capital Stock or assets of such Restricted Subsidiary pending the closing
of such sale or disposition.

Section 3.07.  Limitations on Mergers, Consolidations and Sales of Assets.
               ----------------------------------------------------------

          Neither the Company nor any Guarantor will consolidate or merge with
or into, or sell, lease, convey or otherwise dispose of all or substantially all
of its assets (including, without limitation, by way of liquidation or
dissolution), or assign any of its obligations under the Notes, the Guarantees
or this Indenture (as an entirety or substantially in one transaction or in a
series of related transactions), to any Person (in each case other than in a
transaction in which the Company or a Restricted Subsidiary is the survivor of a
consolidation or merger, or the transferee in a sale, lease, conveyance or other
disposition) unless:  (i) the Person formed by or surviving such consolidation
or merger (if other than the Company or the Guarantor, as the case may be), or
to which such sale, lease, conveyance or other disposition or assignment will be
made (collectively, the "Successor"), is a corporation or other legal entity
                         ---------
organized and existing under the laws of the United States or any state thereof
or the District of Columbia, and the Successor assumes by supplemental indenture
in a form reasonably satisfactory to the Trustee all of the obligations of the
Company or the Guarantor, as the case may be, under the Notes or a Guarantee, as
the case may be, and the Indenture, (ii) immediately after giving effect to such
transaction, no Default or Event of Default has occurred and is continuing,
(iii) immediately after giving effect to such transaction and the use of any net
proceeds therefrom, on a pro forma basis, the Consolidated Net Worth of the
                         --- -----
Company or the Successor (in the case of a transaction involving the Company),
as the case may be, would be at least equal to the Consolidated Net Worth of the
Company immediately prior to such transaction (exclusive of any adjustments to
Consolidated Net Worth attributable to transaction costs) less any amount
treated as a Restricted Payment in connection with such transaction in
accordance with this Indenture and (iv) unless prior to such transaction the
Notes are rated Investment
<PAGE>

                                      -35-

Grade by both Rating Agencies (after which this clause (iv) shall not apply),
immediately after giving effect to such transaction, the Company could incur at
least $1.00 of Indebtedness pursuant to Section 3.01(a) hereof. The foregoing
provisions shall not apply to (i) a transaction involving the sale or
disposition of Capital Stock of a Guarantor, or the consolidation or merger of a
Guarantor, or the sale, lease, conveyance or other disposition of all or
substantially all of the assets of a Guarantor, that in any such case results in
such Guarantor being released from its Guarantee pursuant to the Indenture or
(ii) a transaction the purpose of which is to change the state of incorporation
of the Company or any Guarantor.

Section 3.08.  Reports to Holders of Notes.
               ---------------------------

          The Company will file with the Commission the annual reports and the
information, documents and other reports required to be filed pursuant to
Section 13 or 15(d) of the Exchange Act.  The Company will file with the Trustee
and mail to each Holder of record of Notes such reports, information and
documents within 15 days after it files them with the Commission.  In the event
that the Company is no longer subject to these periodic requirements of the
Exchange Act, it will nonetheless continue to file reports with the Commission
and the Trustee and mail such reports to each Holder of Notes as if it were
subject to such reporting requirements.  Regardless of whether the Company is
required to furnish such reports to its stockholders pursuant to the Exchange
Act, the Company will cause its consolidated financial statements and a
"Management's Discussion and Analysis of Results of Operations and Financial
Condition" written report, similar to those that would have been required to
appear in annual or quarterly reports, to be delivered to Holders of Notes.

                                  ARTICLE FOUR

                           REDEMPTION AND CONVERSIONS

Section 4.01.  Optional Redemption by the Company.
               ----------------------------------

          (a) Right to Redeem; Notice to Trustee.  The Company, at its option,
              ----------------------------------
may redeem the Notes in accordance with the provisions of paragraphs 6 and 8 of
the Notes. If the Company elects to redeem Notes pursuant to paragraph 6 of the
Notes, it shall notify the Trustee in writing of the Redemption Date, the
Principal Amount of Notes to be redeemed, the Redemption Price and the amount of
contingent interest, if any, payable on the Redemption Date. The Company shall
give the notice to the Trustee provided for in this Section 4.01(a) at least 30
days but not more than 60 days before the Redemption Date.

          (b) Selection of Notes to be Redeemed.  If any Note selected for
              ---------------------------------
partial redemption is thereafter surrendered for conversion in part before
termination of the conversion right with respect to the portion of the Note so
selected, the converted portion of such Note shall be deemed (so far as may be),
solely for purposes of determining the aggregate Principal Amount of Notes to be
redeemed by the Company, to be the portion selected
<PAGE>

                                      -36-

for redemption. Notes which have been converted during a selection of Notes to
be redeemed may be treated by the Trustee as outstanding for the purpose of such
selection. Nothing in this Section 4.01(b) shall affect the right of any Holder
to convert any Note pursuant to Sections 4.05, 4.06 and 4.07 before the
termination of the conversion right with respect thereto.

          (c) Notice of Redemption.  At least 30 days but not more than 60 days
              --------------------
before a Redemption Date, the Company shall mail or cause to be mailed a notice
of redemption by first-class mail to the Trustee and to each Holder of Notes to
be redeemed at such Holder's address as it appears on the Note register.

          The notice shall identify the Notes to be redeemed and shall state:

          (i)     the Redemption Date;

          (ii)    the Redemption Price and, to the extent known at the time of
     such notice, the amount of contingent interest, if any, payable on the
     Redemption Date;

          (iii)   the then current Conversion Rate;

          (iv)    the name and address of the Paying Agent and the Conversion
     Agent;

          (v)     that Notes called for redemption must be presented and
     surrendered to the Paying Agent to collect the Redemption Price and
     contingent interest, if any;

          (vi)    that the Notes called for redemption may be converted at any
     time before the close of business on the Redemption Date;

          (vii)   that Holders who wish to convert Notes must comply with the
     procedures in paragraph 10 of the Notes;

          (viii)  that, unless the Company defaults in making payment of such
     Redemption Price and contingent interest, if any, Accreted Value and
     interest (including contingent interest), if any, on the Notes called for
     redemption will cease to accrue on and after the Redemption Date and the
     only remaining right of the Holder will be to receive payment of the
     Redemption Price upon presentation and surrender to the Paying Agent of the
     Notes;

          (ix)    if fewer than all the outstanding Notes are to be redeemed,
     the certificate number and Principal Amounts at Final Maturity of the
     particular Notes to be redeemed; and

          (x)     the CUSIP number or numbers for the Notes called for
     redemption.
<PAGE>

                                      -37-

          At the Company's request, the Trustee shall give the notice of
redemption in the Company's name and at the Company's expense.

          (d) Effect of Notice of Redemption.  Once notice of redemption is
              ------------------------------
mailed, Notes called for redemption become due and payable on the Redemption
Date and at the Redemption Price (together with accrued and unpaid contingent
interest, if any) stated in the notice, except for Notes that are converted in
accordance with the provisions of Sections 4.05, 4.06 and 4.07.  Upon
presentation and surrender to the Paying Agent, Notes called for redemption
shall be paid at the Redemption Price (together with accrued contingent
interest, if any).

          (e) Sinking Fund.  There shall be no sinking fund provided for the
              ------------
Notes.

          (f) Deposit of Redemption Price.  On or before 11:00 a.m. (New York
              ---------------------------
City time) on the Redemption Date, the Company shall deposit with the Trustee or
with the Paying Agent (or, if the Company or an Affiliate of the Company is
acting as the Paying Agent, shall segregate and hold in trust) an amount of
money sufficient to pay the aggregate Redemption Price of, and any accrued and
unpaid contingent interest with respect to, all the Notes to be redeemed on that
date other than the Notes or portions thereof called for redemption which on or
prior thereto have been delivered by the Company to the Trustee for cancellation
or have been converted. The Trustee and the Paying Agent shall, as promptly as
practicable, return to the Company any money not required for that purpose
because of conversion of the Notes in accordance with the provisions of Sections
4.05, 4.06 and 4.07. If such money is then held by the Company or a Subsidiary
in trust and is not required for such purpose, it shall be discharged from such
trust.

Section 4.02.  Purchase at Option of the Holder Upon a Fundamental Change.
               ----------------------------------------------------------

          (a) If a Fundamental Change shall occur at any time prior to May 11,
2003, each Holder of Notes shall have the right, at such Holder's option, to
require the Company to purchase such Holder's Notes on the date (the
"Fundamental Change Purchase Date") (or if such date is not a Business Day, the
---------------------------------
next succeeding Business Day) that is 95 days after the date of the Fundamental
Change. The Notes shall be purchased in integral multiples of $1,000 of
Principal Amount. The Company shall purchase such Notes for Cash at a price (the
"Fundamental Change Purchase Price") equal to the Accreted Value on the
 ---------------------------------
Fundamental Change Purchase Date or for shares of Common Stock as set forth in
Section 4.03. No Notes may be purchased at the option of the Holders due to a
Fundamental Change if there has occurred and is continuing an Event of Default
(other than a default in the payment of the Fundamental Change Purchase Price
with respect to such Notes).

          (b) The Company, or at its request (which must be received by the
Trustee at least three Business Days (or such lesser period as agreed to by the
Trustee) prior to the date the Trustee is requested to give such notice as
described below) the Trustee in the name
<PAGE>

                                      -38-

of and at the expense of the Company, shall mail to all Holders of record of the
Notes a notice (a "Fundamental Change Purchase Notice") of the occurrence of a
                   ----------------------------------
Fundamental Change and of the purchase right arising as a result thereof,
including the information required by Section 4.03(f), on or before the 30th day
after the occurrence of such Fundamental Change. The Company shall promptly
furnish to the Trustee a copy of such notice.

          (c) For a Note to be so purchased at the option of the Holder, the
Paying Agent must receive such Note with the form entitled "Fundamental Change
Purchase Notice" on the reverse thereof duly completed, together with such Note
duly endorsed for transfer, on or before the 60th day after the Fundamental
Change Purchase Notice is delivered; provided, however, if the Notes are in
book-entry form such transfer shall be made in accordance with the customary
practices of the depository. All questions as to the validity, eligibility
(including time of receipt) and acceptance of any Note for redemption shall be
determined by the Company, whose determination shall be final and binding.

Section 4.03.  Purchase of Notes at the Option of the Holder; Payment of
               Purchase Price or Fundamental Change Purchase Price in Stock.
               ------------------------------------------------------------

          (a) Purchase of Notes at the Option of the Holder.  On each of May 11,
              ---------------------------------------------
2003, May 11, 2008 and May 11, 2013 (each, a "Purchase Date"), at the purchase
                                              -------------
price specified in paragraph 7 of the Notes (each, a "Purchase Price"), a Holder
                                                      --------------
of Notes shall have the option to require the Company to purchase any
outstanding Notes, upon:

          (i)    delivery to the Paying Agent by the Holder of a written notice
     of purchase (a "Purchase Notice") at any time from the opening of business
                     ---------------
     on the date that is 30 Business Days prior to a Purchase Date until the
     close of business on such Purchase Date, stating:

                 (A) the certificate numbers of the Notes which the Holder shall
          deliver to be purchased;

                 (B) the portion of the Principal Amount of the Notes which the
          Holder shall deliver to be purchased, which portion must be $1,000 in
          Principal Amount or a multiple thereof;

                 (C) that such Notes shall be purchased as of the Purchase Date
          pursuant to the terms and conditions specified in paragraph 7 of the
          Notes and in this Supplemental Indenture; and

                 (D) if the Company elects, pursuant to a Company Notice, to pay
          the Purchase Price to be paid as of such Purchase Date, in whole or in
          part, in Common Stock but such portion of the Purchase Price shall
          ultimately be payable to such Holder in Cash because any of the
          conditions to the payment of the Purchase Price in Common Stock are
          not satisfied prior to or on the Pur-
<PAGE>

                                      -39-

          chase Date, as set forth in Section 4.03(d), whether such Holder
          elects (x) to withdraw such Purchase Notice as to some or all of the
          Notes to which such Purchase Notice relates (stating the Principal
          Amount and certificate numbers of the Notes as to which such
          withdrawal shall relate), or (y) to receive Cash in respect of the
          entire Purchase Price for all Notes (or portions thereof) to which
          such Purchase Notice relates; and

          (ii)   delivery or book-entry transfer of such Note to the Paying
     Agent prior to, on or after the Purchase Date (together with all necessary
     endorsements) at the offices of the Paying Agent, such delivery or transfer
     being a condition to receipt by the Holder of the Purchase Price therefor;

     provided, however, that such Purchase Price shall be so paid pursuant to
     --------  -------
     this Section 4.03 only if the Note so delivered or transferred to the
     Paying Agent shall conform in all respects to the description thereof in
     the related Purchase Notice.

          (b) Procedures.  If a Holder, in such Holder's Purchase Notice or
              ----------
Fundamental Change Purchase Notice (and in any written notice of withdrawal of a
portion of a Holder's Notes previously submitted for purchase pursuant to a
Purchase Notice or Fundamental Change Purchase Notice, the portion that remains
subject to the Purchase Notice or Fundamental Change Purchase Notice), fails to
indicate such Holder's choice with respect to the election regarding a
conditional withdrawal pursuant to the terms of clause (D) of Section 4.03(a)(i)
or the penultimate paragraph of the Fundamental Change Purchase Notice such
Holder shall be deemed to have elected to receive Cash in respect of all Notes
subject to such Purchase Notice or Fundamental Change Purchase Notice in the
circumstances set forth in such clause (D) and penultimate paragraph.

          The Company shall purchase from the Holder thereof, pursuant to this
Section 4.03, a portion of a Note if the Principal Amount of such portion is
$1,000 or a multiple of $1,000 if so requested by the Holder. Provisions of this
Supplemental Indenture that apply to the purchase of all of a Note also apply to
the purchase of such portion of such Note.

          Any purchase by the Company contemplated pursuant to the provisions of
Section 4.02 or this Section 4.03 shall be consummated by the delivery of the
consideration to be received by the Holder (together with accrued and unpaid
contingent interest, if any) promptly following the later of the Purchase Date
and the time of delivery or book-entry transfer of the Note.

          Notwithstanding anything herein to the contrary, any Holder delivering
to the Paying Agent the Purchase Notice or Fundamental Change Purchase Notice
contemplated by Section 4.02 or this Section 4.03(a) shall have the right at any
time prior to the close of business on the Purchase Date or Fundamental Change
Purchase Date to withdraw such Purchase
<PAGE>

                                      -40-

Notice or Fundamental Change Purchase Notice (in whole or in part) by delivery
of a written notice of withdrawal to the Paying Agent in accordance with Section
4.04(a).

          The Paying Agent shall promptly notify the Company of the receipt by
it of any Purchase Notice or Fundamental Change Purchase Notice or written
notice of withdrawal thereof.

          (c) Company's Right to Elect Manner of Payment of Purchase Price.  The
              ------------------------------------------------------------
Company may elect with respect to any Purchase Date or Fundamental Change
Purchase Date to pay the Purchase Price or Fundamental Change Purchase Price in
respect of the Notes to be purchased pursuant to Section 4.02 or Section 4.03(a)
as of such Purchase Date or Fundamental Change Purchase Date, in U.S. legal
tender ("Cash") or Common Stock, or in any combination of Cash and Common Stock,
         ----
subject to the conditions set forth in Sections 4.03(d) and (e); provided,
                                                                 --------
however, that any Purchase Price paid on May 11, 2003 pursuant to Section
-------
4.03(a) must be paid fully in Cash.  The Company shall designate, in the Company
Notice delivered pursuant to Section 4.03(f), whether the Company shall purchase
the Notes for Cash or Common Stock, or, if a combination thereof, the
percentages of the Purchase Price or Fundamental Change Purchase Price of Notes
in respect of which it shall pay in Cash and/or Common Stock; provided that the
Company shall pay Cash for fractional interests in Common Stock.  For purposes
of determining the existence of potential fractional interests, all Notes
subject to purchase by the Company held by a Holder shall be considered together
(no matter how many separate certificates are to be presented).  Each Holder
whose Notes are purchased pursuant to this Section 4.03 shall receive the same
percentage of Cash and/or Common Stock in payment of the Purchase Price or
Fundamental Change Purchase Price for such Notes, except (i) as provided in
Section 4.03(e) with regard to the payment of Cash in lieu of fractional
interests in Common Stock and (ii) in the event that the Company is unable to
purchase the Notes of a Holder or Holders for Common Stock because any necessary
qualifications or registrations of the Common Stock under applicable federal or
state securities laws cannot be obtained, the Company may purchase the Notes of
such Holder or Holders for Cash.  Once the Company has given its Company Notice
to Holders, the Company may not change its election with respect to the
consideration (or components or percentages of components thereof) to be paid
except pursuant to this Section 4.03(c) or Section 4.03(e).

          At least five Business Days before the Company Notice Date, the
Company shall deliver an Officers' Certificate to the Trustee specifying:

          (i)    the manner of payment selected by the Company;

          (ii)   the information required by Section 4.03(f);

          (iii)  if the Company elects to pay the Purchase Price or
     Fundamental Change Purchase Price, or a specified percentage thereof, in
     Common Stock, that the
<PAGE>

                                      -41-

     conditions to such manner of payment set forth in Section 4.03(e) have been
     or shall be complied with; and

          (iv)   whether the Company desires the Trustee to give the Company
     Notice required by Section 4.03(f).

          (d) Purchase with Cash.  At the option of the Company, the Purchase
              ------------------
Price or Fundamental Change Purchase Price of Notes in respect of which a
Purchase Notice or Fundamental Change Purchase Notice pursuant to Section 4.02
or Section 4.03(a) has been given, or a specified percentage thereof, may be
paid by the Company with Cash equal to the aggregate Purchase Price or
Fundamental Change Repurchase Price, or such specified percentage thereof, as
the case may be, of such Notes.

          (e) Payment by Issuance of Common Stock.  At the option of the
              -----------------------------------
Company, subject to Section 4.03(c), the Purchase Price of Notes in respect of
which a Purchase Notice pursuant to Section 4.03(a) or Fundamental Change
Purchase Notice has been given, or a specified percentage thereof, may be paid
by the Company by the issuance of a number of shares of Common Stock equal to
the quotient obtained by dividing (x) the amount of Cash to which the Holders
would have been entitled had the Company elected to pay all or such specified
percentage, as the case may be, of the Purchase Price or Fundamental Change
Purchase Price of such Notes in Cash by (y) 0.95 times the Market Price of a
share of Common Stock, subject to the next succeeding paragraph.

          The Company shall not issue a fractional share of Common Stock in
payment of the Purchase Price or Fundamental Change Purchase Price.  Instead the
Company shall pay Cash for the current market value of the fractional share.
The current market value of a fraction of a share shall be determined by
multiplying the Market Price by such fraction and rounding the product to the
nearest whole cent.  It is understood that if a Holder elects to have more than
one Note purchased, the number of shares of Common Stock shall be based on the
aggregate amount of Notes to be purchased.

          The Company's right to exercise its election to purchase the Notes
pursuant to Section 4.02 or Section 4.03 through the issuance of shares of
Common Stock shall be conditioned upon:

          (i)    the Company having given timely written notice in accordance
     with Section 4.03(f) of its election to purchase all or a specified
     percentage of the Notes with Common Stock as provided herein;

          (ii)   (A)(1) the registration of the shares of Common Stock to be
     issued in respect of the payment of the specified percentage of the
     Purchase Price or Fundamental Change Purchase Price under the Securities
     Act of 1933 or (2) the issuance of the shares of Common Stock in an action
     which is exempt from the registration re-
<PAGE>

                                      -42-

     quirements of the Securities Act of 1933 and which will not result in such
     shares of Common Stock being deemed "restricted securities" under the
     Securities Act of 1933 or otherwise and (B) the registration of the shares
     of Common Stock under the Securities Exchange Act of 1934, to the extent
     required thereby;

          (iii)  any necessary qualification or registration under applicable
     state securities laws or the availability of an exemption from such
     qualification and registration; and

          (iv)   the receipt by the Trustee of an Officers' Certificate and an
     Opinion of Counsel each stating that (A) the terms of the issuance of the
     Common Stock are in conformity with this Supplemental Indenture and (B) the
     shares of Common Stock to be issued by the Company in payment of the
     specified percentage of the Purchase Price or Fundamental Change Purchase
     Price in respect of Notes have been duly authorized and, when issued and
     delivered pursuant to the terms of this Supplemental Indenture in payment
     of the specified percentage of the Purchase Price or Fundamental Change
     Purchase Price in respect of Notes, shall be validly issued, fully paid and
     nonassessable, and, to the best of such counsel's knowledge, free from
     preemptive rights, and in the case of such Officers' Certificate, stating
     that conditions (i), (ii) and (iii) above have been satisfied and, in the
     case of such Opinion of Counsel, stating that condition (ii) above has been
     satisfied.

          Such Officers' Certificate shall also set forth the number of shares
of Common Stock to be issued for each $1,000 Principal Amount of Notes and the
Sale Price of a share of Common Stock on each Trading Day during the period
during which the Market Price is calculated and ending on the Purchase Date or
Fundamental Change Purchase Date. The Company may elect to pay the Purchase
Price or Fundamental Change Purchase Price (or any portion thereof) in Common
Stock only if the information necessary to calculate the Market Price is
reported in a daily newspaper of national circulation. If any of the conditions
set forth in this Section 4.03(e) are not satisfied with respect to a Holder or
Holders prior to or on the Purchase Date or Fundamental Change Repurchase Date
and the Company elected to purchase the Notes to be purchased as of such
Purchase Date or Fundamental Change Repurchase Date pursuant to Section 4.02 or
this Section 4.03 through the issuance of shares of Common Stock, the Company
shall pay the entire Purchase Price or Fundamental Change Purchase Price in
respect of such Notes of such Holder or Holders in Cash.

          Upon determination of the actual number of shares of Common Stock
which the Holder of each $1,000 Principal Amount of the Notes shall receive, the
Company shall publish such determination in a daily newspaper of national
circulation.

          (f) Notice of Election.  The Company's notices of election to purchase
              ------------------
with Cash or Common Stock, or any combination thereof (each a "Company Notice"),
                                                               --------------
shall be sent to the Holders (and to beneficial owners if required by applicable
law) at their ad-
<PAGE>

                                      -43-

dresses shown in the Note register maintained by the Registrar, and delivered to
the Trustee, not less than 30 Business Days prior to the Purchase Date (the
"Company Notice Date") or on or before the 30th day after the occurrence of the
 -------------------
Fundamental Change, as the case may be. Such Company Notices shall state the
manner of payment elected and shall contain the following information.

          In the event the Company has elected to pay a Purchase Price or
Fundamental Change Purchase Price (or a specified percentage thereof) with
Common Stock, the Company Notice shall:

          (i)    state that each Holder shall receive Common Stock in respect of
     the specified percentage of the Purchase Price or Fundamental Change
     Purchase Price of the Notes held by such Holder (except any Cash amount to
     be paid in lieu of fractional shares);

          (ii)   state that the total number of shares of Common Stock to be
     issued to Holders will be equal to the quotient obtained by dividing (x)
     the amount of cash to which the Holders would have been entitled had the
     Company elected to pay all or such specified percentage, as the case may
     be, of the Purchase Price or Fundamental Change Purchase Price of such
     Notes in cash by (y) 0.95 times the Market Price of a share of Common
     Stock;

          (iii)  set forth the method of calculating the Market Price of the
     Common Stock; and

          (iv)   state that because the Market Price of Common Stock will be
     determined prior to the Purchase Date or Fundamental Change Purchase Date,
     Holders will bear the market risk with respect to the value of the Common
     Stock to be received from the date such Market Price is determined to the
     Purchase Date.

          In any case, each Company Notice shall include a form of Purchase
Notice or Fundamental Change Repurchase Notice to be completed by a Holder and
shall state:

          (i)    the Purchase Price, the Fundamental Change Purchase Price, the
     Conversion Rate and, to the extent known at the time of such notice, the
     amount of contingent interest, if any, that will be payable with respect to
     the Notes on the Purchase Date;

          (ii)   the name and address of the Paying Agent and the Conversion
     Agent;

          (iii)  that Notes as to which a Purchase Notice or Fundamental Change
     Purchase Notice has been given may be converted only if the applicable
     Purchase Notice has been withdrawn in accordance with the terms of this
     Supplemental Indenture;
<PAGE>

                                      -44-

          (iv)   that Notes must be surrendered to the Paying Agent to collect
     payment of the Purchase Price or Fundamental Change Purchase Price and
     contingent interest, if any;

          (v)    that the Purchase Price or Fundamental Change Purchase Price
     for any Note as to which a Purchase Notice has been given and not
     withdrawn, together with any accrued contingent interest payable with
     respect thereto, shall be paid promptly following the later of the Purchase
     Date or Fundamental Change Purchase Date and the time of surrender of such
     Note as described in (iv);

          (vi)   the procedures the Holder must follow under Section 4.02 and
     Section 4.03;

          (vii)  briefly, the conversion rights of the Notes;

          (viii) that, unless the Company defaults in making payment of such
     Purchase Price or Fundamental Change Purchase Price and contingent
     interest, if any, Accreted Value and interest (including contingent
     interest), if any, on Notes covered by any Purchase Notice or Fundamental
     Change Purchase Notice (or interest, if the Notes have been converted into
     Cash Pay Notes pursuant to Section 4.08 of this Supplemental Indenture), if
     any, will cease to accrue on and after the Purchase Date or the Fundamental
     Change Purchase Date, as the case may be;

          (ix)   the CUSIP or ISIN number of the Notes; and

          (x)    the procedures for withdrawing a Purchase Notice or Fundamental
     Change Purchase Notice (including, without limitation, for a conditional
     withdrawal pursuant to the terms of Section 4.03(a)(i)(D) or the
     penultimate paragraph of the Fundamental Change Purchase Notice).

          At the Company's request and at the Company's expense, the Trustee
shall give the Company Notice in the Company's name; provided, however, that, in
                                                     --------  -------
all cases, the text of the Company Notice shall be prepared by the Company.

          (g) Covenants of the Company.  All shares of Common Stock delivered
              ------------------------
upon conversion or purchase of the Notes shall be newly issued shares or
treasury shares, shall be fully paid and nonassessable and shall be free from
preemptive rights and free of any lien or adverse claim.

          The Company shall cause to have listed or quoted all such shares of
Common Stock on each United States national securities exchange or over-the-
counter or other domestic market on which the Common Stock is then listed or
quoted.
<PAGE>

                                      -45-

          (h) Procedure upon Purchase.  On or before 11:00 a.m. (New York City
              -----------------------
time) on the Purchase Date or Fundamental Change Purchase Date, the Company
shall deposit with the Paying Agent Cash (in respect of a Cash purchase under
Section 4.03(d) or for fractional interests or contingent interest, as
applicable), or shares of Common Stock, or a combination thereof, as applicable,
sufficient to pay the aggregate Purchase Price or Fundamental Change Purchase
Price of, and any accrued and unpaid interest with respect to, the Notes to be
purchased pursuant to this Section 4.03.  Payment of the Purchase Price or
Fundamental Change Purchase Price for such Note shall be made as soon as
practicable following the later of the Purchase Date or Fundamental Change
Purchase Date or the time of book-entry transfer or delivery of such Note.  If
the Company is delivering Common Stock, the Company shall deliver to each Holder
entitled to receive Common Stock, through the Paying Agent, a certificate for
the number of full shares of Common Stock, as applicable, issuable in payment of
such Purchase Price or Fundamental Change Purchase Price and Cash in lieu of any
fractional interests.  The Person in whose name the certificate for Common Stock
is registered shall be treated as a holder of record following the Purchase Date
or Fundamental Change Purchase Date.  Subject to Section 4.03(e), no payment or
adjustment shall be made for dividends on the Common Stock the Record Date for
which occurred on or prior to the Purchase Date or Fundamental Change Purchase
Date.  If the Paying Agent holds, in accordance with the terms of the Indenture,
money or securities sufficient to pay the Purchase Price or Fundamental Change
Purchase Price of such Note on the Business Day following the Purchase Date or
Fundamental Change Purchase Date, then, on and after such date, such Note shall
cease to be outstanding and Accreted Value on such Note shall cease to accrue,
whether or not book-entry transfer of such Note is made or such Note is
delivered to the Paying Agent, and all other rights of the Holder shall
terminate (other than the right to receive the Purchase Price or Fundamental
Change Purchase Price upon delivery or transfer of the Note).

          (i) Taxes.  If a Holder of a Note is paid in Common Stock, the Company
              -----
shall pay any documentary, stamp or similar issue or transfer tax due on such
issue of shares of Common Stock.  However, the Holder shall pay any such tax
which is due because the Holder requests the shares of Common Stock to be issued
in a name other than the Holder's name.  The Paying Agent may refuse to deliver
the certificates representing the Common Stock being issued in a name other than
the Holder's name until the Paying Agent receives a sum sufficient to pay any
tax which shall be due because the shares of Common Stock are to be issued in a
name other than the Holder's name.  Nothing herein shall preclude any income tax
withholding required by law or regulations.

Section 4.04.  Further Conditions for Purchase at the Option of Holders upon a
               Fundamental Change and Purchase of Notes at the Option of the
               Holder.
               ---------------------------------------------------------------

          (a) Effect of Purchase Notice or Fundamental Change Purchase Notice.
              ---------------------------------------------------------------
Upon receipt by the Company of the Purchase Notice or Fundamental Change
Purchase No-
<PAGE>

                                      -46-

tice specified in Section 4.03(a) or Section 4.02(c), as applicable, the Holder
of the Note in respect of which such Purchase Notice or Fundamental Change
Purchase Notice, as the case may be, was given shall (unless such Purchase
Notice or Fundamental Change Purchase Notice is withdrawn as specified in the
following two paragraphs) thereafter be entitled to receive solely the Purchase
Price or Fundamental Change Purchase Price, as the case may be, and any accrued
and unpaid contingent interest, if any, with respect to such Note. Such Purchase
Price or Fundamental Change Purchase Price and contingent interest, if any,
shall be paid to such Holder promptly following the later of (x) the Purchase
Date or the Fundamental Change Purchase Date, as the case may be, with respect
to such Note (provided the conditions in Section 4.03(a) or Section 4.02(c), as
applicable, have been satisfied) and (y) the time of delivery or book-entry
transfer of such Note to the Paying Agent by the Holder thereof in the manner
required by Section 4.03(a) or Section 4.02(c), as applicable. Notes in respect
of which a Purchase Notice or Fundamental Change Purchase Notice, as the case
may be, has been given by the Holder thereof may not be converted for shares of
Common Stock on or after the date of the delivery of such Purchase Notice (or
Fundamental Change Purchase Notice, as the case may be), unless such Purchase
Notice (or Fundamental Change Purchase Notice, as the case may be) has first
been validly withdrawn as specified in the following two paragraphs.

          A Purchase Notice or Fundamental Change Purchase Notice, as the case
may be, may be withdrawn by means of a written notice of withdrawal delivered to
the office of the Paying Agent at any time prior to the close of business on the
Purchase Date or the Fundamental Change Purchase Date, as the case may be, to
which it relates specifying:

          (a)  the certificate number of the Notes in respect of which such
     notice of withdrawal is being submitted;

          (b)  the Principal Amount of the Notes with respect to which such
     notice of withdrawal is being submitted; and

          (c)  the Principal Amount, if any, of the Notes which remain subject
     to the original Purchase Notice or Company Fundamental Change Notice, as
     the case may be, and which has been or shall be delivered for purchase by
     the Company.

          A written notice of withdrawal of a Purchase Notice or Fundamental
Change Purchase Notice may be in the form of (i) a conditional withdrawal
contained in a Purchase Notice pursuant to the terms of Section 4.03(a)(i)(D) or
a Fundamental Change Purchase Notice pursuant to the penultimate paragraph
thereof or (ii) a conditional withdrawal containing the information set forth in
the preceding paragraph and contained in a written notice of withdrawal
delivered to the Paying Agent as set forth in the preceding paragraph.

          There shall be no purchase of any Notes pursuant to Section 4.02 or
Section 4.03 (other than through the issuance of Common Stock in payment of the
Purchase Price
<PAGE>

                                      -47-

or Fundamental Purchase Price, including Cash in lieu of any fractional shares)
or redemption pursuant to Section 4.02 if there has occurred prior to, on or
after, as the case may be, the giving, by the Holders of such Notes, of the
required Purchase Notice (or Fundamental Change Purchase Notice, as the case may
be) and is continuing an Event of Default (other than a default in the payment
of the Purchase Price or Fundamental Change Purchase Price, as the case may be,
and any accrued and unpaid contingent interest with respect to such Notes). The
Paying Agent will promptly return to the respective Holders thereof any Notes
(x) with respect to which a Purchase Notice or Fundamental Change Purchase
Notice, as the case may be, has been withdrawn in compliance with this
Supplemental Indenture, or (y) held by it during the continuance of an Event of
Default (other than a default in the payment of the Purchase Price or
Fundamental Change Purchase Price, as the case may be, and any accrued and
unpaid contingent interest with respect to such Notes) in which case, upon such
return, the Purchase Notice or Fundamental Change Purchase Notice with respect
thereto shall be deemed to have been withdrawn.

          (b) Deposit of Purchase Price or Fundamental Change Purchase Price.
              --------------------------------------------------------------
On or before 11:00 a.m.  (New York City time) on a Purchase Date or a
Fundamental Change Purchase Date, as the case may be, the Company shall deposit
with the Trustee or with the Paying Agent (or, if the Company or an Affiliate of
the Company is acting as the Paying Agent, shall segregate and hold in trust) an
amount of money and/or Common Stock, if permitted hereunder, sufficient to pay
the aggregate Purchase Price or Fundamental Change Purchase Price, as the case
may be, of, and any accrued and unpaid contingent interest, with respect to,
all the Notes or portions thereof which are to be purchased as of such Purchase
Date or Fundamental Change Redemption Date, as the case may be.

          (c) Notes Purchased in Part.  Any Note that is to be purchased only in
              -----------------------
part shall be surrendered at the office of the Paying Agent (with, if the
Company or the Trustee so requires, due endorsement by, or a written instrument
of transfer in form satisfactory to the Company and the Trustee duly executed
by, the Holder thereof or such Holder's attorney duly authorized in writing) and
the Company shall execute and the Trustee shall authenticate and deliver to the
Holder of such Note, without service charge, a new Note or Notes, of any
authorized denomination as requested by such Holder in aggregate Principal
Amount equal to, and in exchange for, the portion of the Principal Amount of the
Note so surrendered which is not purchased or redeemed.

          (d) Covenant to Comply with Securities Laws upon Purchase of Notes.
              --------------------------------------------------------------
In connection with any offer to purchase Notes under Section 4.02 or 4.03
hereof, the Company shall (i) comply with Rules 13e-4 and 14e-1 (which terms, as
used herein, include any successor provision thereto) under the Securities
Exchange Act of 1934, if applicable; (ii) file the related Schedule TO (or any
successor schedule, form or report) under the Securities Exchange Act of 1934,
if applicable; and (iii) otherwise comply with all federal and state securi-
<PAGE>

                                      -48-

ties laws so as to permit the rights and obligations under Sections 4.02 and
4.03 to be exercised in the time and in the manner specified in Sections 4.02
and 4.03.

          (e) Repayment to the Company.  The Trustee and the Paying Agent shall
              ------------------------
return to the Company any Cash or shares of Common Stock that remain unclaimed
as provided in paragraph 15 of the Notes, together with interest that the
Trustee has agreed to pay, if any, or dividends, if any, paid thereon while such
shares are held by the Trustee or the Paying Agent, held by them for the payment
of a Purchase Price or Fundamental Change Purchase Price, as the case may be or
contingent interest, if any; provided, however, that to the extent that the
                             --------  -------
aggregate amount of Cash or shares of Common Stock deposited by the Company
pursuant to Section 4.04(b) exceeds the aggregate Purchase Price or Fundamental
Change Purchase Price, as the case may be, of, and any accrued and unpaid
contingent interest with respect to the Notes or portions thereof which the
Company is obligated to purchase as of the Purchase Date or Fundamental Change
Purchase Date, as the case may be, then promptly after the Business Day
following the Purchase Date or Fundamental Change Purchase Date, as the case may
be, the Trustee and the Paying Agent shall return any such excess to the Company
together with interest that the Trustee has agreed to pay, if any, or dividends,
if any, paid thereon while such Cash or shares are held by the Trustee or the
Paying Agent.

Section 4.05.  Conversion of Notes.
               -------------------

          (a) Right to Convert.  A Holder of a Note may convert such Note for
              ----------------
Common Stock at any time during which the conditions stated in paragraph 10 of
the Notes are met. The number of shares of Common Stock issuable upon conversion
of a Note per $1,000 of Principal Amount (the "Conversion Rate") shall be that
                                               ---------------
set forth in paragraph 10 in the Notes, subject to adjustment as herein set
forth.

          A Holder may convert a portion of the Principal Amount of a Note if
the portion is $1,000 or a multiple of $1,000. Provisions of this Supplemental
Indenture that apply to conversion of all of a Note also apply to conversion of
a portion of a Note.

          (b) Conversion Procedures.  To convert a Note a Holder must satisfy
              ---------------------
the requirements in paragraph 10 of the Notes.  The date on which the Holder of
Notes satisfies all those requirements is the conversion date (the "Conversion
                                                                    ----------
Date").  As soon as practicable, but in no event later than the fifth Business
----
Day following the Conversion Date the Company shall deliver to the Holder,
through the Conversion Agent, a certificate for the number of full shares of
Common Stock issuable upon the conversion and Cash in lieu of any fractional
share determined pursuant to Section 4.05(c).  The Person in whose name the
certificate is registered shall be treated as a stockholder of record on and
after the Conversion Date; provided, however, that no surrender of a Note on any
                           --------  -------
date when the stock transfer books of the Company shall be closed shall be
effective to constitute the Person or Persons entitled to receive the shares of
Common Stock upon such conversion as the record holder or holders of such shares
of Common Stock on such date, but such surrender shall be effective to
constitute
<PAGE>

                                      -49-

the Person or Persons entitled to receive such shares of Common Stock as the
record holder or holders thereof for all purposes at the close of business on
the next succeeding day on which such stock transfer books are open; such
conversion shall be at the Conversion Rate in effect on the date that such Note
shall have been surrendered for conversion, as if the stock transfer books of
the Company had not been closed. Upon conversion of a Note, such Person shall no
longer be a Holder of such Note.

          No payment or adjustment shall be made for dividends on or other
distributions with respect to any Common Stock except as provided in Section
4.06. On conversion of a Note, that portion of Accreted Value (or interest, if
the Company has exercised its option to convert the Notes to Cash Pay Notes
pursuant to Section 4.08) attributable to the period from the Issue Date of the
Note to the Conversion Date and accrued contingent interest with respect to the
converted Note shall not be canceled, extinguished or forfeited, but rather
shall be deemed to be paid in full to the Holder thereof through delivery of the
Common Stock (together with the Cash payment, if any, in lieu of fractional
shares) in exchange for the Note being converted.

          If a Holder converts more than one Note at the same time, the number
of shares of Common Stock issuable upon the conversion shall be based on the
total Principal Amount at Final Maturity of the Notes converted.

          Upon surrender of a Note that is converted in part, the Company shall
execute, and the Trustee shall authenticate and deliver to the Holder, a new
Note in an authorized denomination equal in Principal Amount (or the Restated
Principal Amount, if applicable) to the unconverted portion of the Note
surrendered.

          If the last day on which a Note may be converted is a legal holiday in
a place where a Conversion Agent is located, the Note may be surrendered to that
Conversion Agent on the next succeeding day that it is not a legal holiday.

          (c) Cash Payments in Lieu of Fractional Shares.  The Company shall not
              ------------------------------------------
issue a fractional share of Common Stock upon conversion of a Note.  Instead the
Company shall deliver Cash for the current market value of the fractional share.
The current market value of a fractional share shall be determined to the
nearest 1/10,000th of a share by multiplying the Sale Price of a full share of
Common Stock on the Trading Day immediately preceding the Conversion Date by the
fractional amount and rounding the product to the nearest whole cent.

          (d) Taxes on Conversion.  If a Holder converts a Note, the Company
              -------------------
shall pay any documentary, stamp or similar issue or transfer tax due on the
issue of shares of Common Stock upon the conversion.  However, the Holder shall
pay any such tax which is due because the Holder requests the shares to be
issued in a name other than the Holder's name.  The Conversion Agent may refuse
to deliver the certificates representing the Common Stock being issued in a name
other than the Holder's name until the Conversion Agent receives a sum
sufficient to pay any tax which shall be due because the shares are to be issued
in
<PAGE>

                                      -50-

a name other than the Holder's name. Nothing herein shall preclude any tax
withholding required by law or regulations.

          (e) Company to Provide Stock.  The Company shall, prior to issuance of
              ------------------------
any Notes hereunder, and from time to time as may be necessary, reserve out of
its authorized but unissued Common Stock a sufficient number of shares of Common
Stock to permit the conversion of the Notes.

          All shares of Common Stock delivered upon conversion of the Notes
shall be newly issued shares or treasury shares, shall be duly and validly
issued and fully paid and nonassessable and shall be free from preemptive rights
and free of any lien or adverse claim.

          The Company shall endeavor promptly to comply with all federal and
state securities laws regulating the order and delivery of shares of Common
Stock upon the conversion of Notes, if any, and shall cause to have listed or
quoted all such shares of Common Stock on each United States national securities
exchange or over-the-counter or other domestic market on which the Common Stock
is then listed or quoted.

Section 4.06.  Adjustments to Conversion Rate.
               ------------------------------

          The Conversion Rate shall be adjusted from time to time by the Company
as follows:

          (a) In case the Company shall (i) pay a dividend, or make a
     distribution, in shares of Common Stock or other capital stock, on Common
     Stock; (ii) subdivide its outstanding Common Stock into a greater number of
     shares; or (iii) combine its outstanding Common Stock into a smaller number
     of shares, the Conversion Rate in effect immediately prior thereto shall be
     adjusted so that the holder of any Note thereafter surrendered for
     conversion shall be entitled to receive the number of shares of Common
     Stock which such holder would have owned or have been entitled to receive
     after the happening of any of the events described above had such Note been
     converted immediately prior to the happening of such event. If any dividend
     or distribution of the type described in clause (i) above is not so paid or
     made, the Conversion Rate shall again be adjusted to the Conversion Rate
     which would then be in effect if such dividend or distribution had not been
     declared. An adjustment made pursuant to this Section 4.06 shall become
     effective immediately after the Record Date in the case of a dividend and
     shall become effective immediately after the effective date in the case of
     subdivision or combination.

          (b) In case the Company shall issue rights or warrants to all holders
     of any class or series of its Common Stock entitling them (for a period
     expiring within 60 days after the date fixed for determination of
     stockholders entitled to receive such rights or warrants) to subscribe for
     or purchase Common Stock at a price per share less than the

<PAGE>

                                      -51-

     Sale Price per share of Common Stock on the day preceding the date of
     announcement of the Record Date for the determination of stockholders
     entitled to receive such rights or warrants, the Conversion Rate in effect
     immediately prior thereto shall be adjusted so that the same shall equal
     the Conversion Rate determined by multiplying the Conversion Rate in effect
     immediately prior to the date of the issuance of such rights or warrants by
     a fraction of which the numerator shall be the number of shares of Common
     Stock outstanding on the date of issuance of such rights or warrants plus
     the number of additional shares of Common Stock offered for subscription or
     purchase, and of which the denominator shall be the number of shares of
     Common Stock outstanding on the date of issuance of such rights or warrants
     plus the number of shares which the aggregate offering price of the total
     number of shares so offered would purchase at such Sale Price. Such
     adjustment shall be made successively whenever any such rights or warrants
     are issued, and shall become effective immediately after the opening of
     business on the day following the Record Date for the determination of the
     stockholders entitled to receive such rights or warrants. To the extent
     that shares of Common Stock are not delivered after the expiration of such
     rights or warrants, the Conversion Rate shall be readjusted to the
     Conversion Rate which would then be in effect had the adjustments made upon
     the issuance of such rights or warrants been made on the basis of delivery
     of only the number of shares of Common Stock actually delivered. If such
     rights or warrants are not so issued, the Conversion Rate shall again be
     adjusted to be the Conversion Rate which would then be in effect if such
     Record Date for the determination of stockholders entitled to receive such
     rights or warrants had not been fixed. In determining whether any rights or
     warrants entitle the holders to subscribe for or purchase shares of Common
     Stock at less than such Sale Price, and in determining the aggregate
     offering price of such shares of Common Stock, there shall be taken into
     account any consideration received by the Company for such rights or
     warrants, the value of such consideration, if other than cash, to be
     determined by the Board of Directors.

          (c) In case the Company shall, by dividend or otherwise, distribute to
     all holders of its Common Stock (excluding any distribution in connection
     with the liquidation, dissolution or winding up of the Company, whether
     voluntary or involuntary) evidences of its indebtedness or assets (other
     than Cash) or rights or warrants to subscribe for or purchase any of its
     securities (excluding those referred to in Section 4.06(b)) (any of the
     foregoing hereinafter in this Section 4.06(c) called the "Distributed
                                                               -----------
     Securities"), then, the Conversion Rate shall be adjusted so that the same
     ----------
     shall equal the Conversion Rate determined by multiplying the Conversion
     Rate in effect immediately prior to the date of such distribution by a
     fraction of which the numerator shall be the Market Price per share of the
     Common Stock on the Record Date mentioned below, and the denominator shall
     be the Market Price per share of the Common Stock on such Record Date less
     the fair market value on such Record Date (as determined by the Board of
     Directors, whose determination shall be conclusive, and described in a

<PAGE>

                                      -52-

     certificate filed with the Trustee) of the Distributed Securities so
     distributed applicable to one share of Common Stock. Such adjustment shall
     become effective immediately after the Record Date for the determination of
     stockholders entitled to receive such distribution. Notwithstanding the
     foregoing, in the event (a) the then fair market value (as so determined)
     of the portion of the Distributed Securities so distributed applicable to
     one share of Common Stock is equal to or greater than the Market Price of
     the Common Stock on the Record Date or (b) such Market Price exceeds the
     fair market value of such Distributed Securities by less than $1.00, in
     lieu of the foregoing adjustment, adequate provision shall be made so that
     each Holder shall have the right to receive upon conversion the amount of
     Distributed Securities such Holder would have received had such Holder
     converted each Note on such Record Date. In the event that such
     distribution is not so paid or made, the Conversion Rate shall again be
     adjusted to the Conversion Rate which would then be in effect if such
     distribution had not been declared. If the Board of Directors determines
     the fair market value of any distribution for purposes of this Section
     4.06(c) by reference to the actual or when issued trading market for any
     securities, it must in doing so consider the prices in such market on the
     same day used in computing the Sale Price of the Common Stock.

          Notwithstanding the foregoing provisions of this Section 4.06(c), no
     adjustment shall be made thereunder for any distribution of Distributed
     Securities if the Company makes proper provision so that each Holder of a
     Note who converts such Note (or any portion thereof) after the Record Date
     for such distribution shall be entitled to receive upon such conversion, in
     addition to the shares of Common Stock issuable upon such conversion, the
     amount and kind of Distributed Securities that such Holder would have been
     entitled to receive if such Holder had, immediately prior to such Record
     Date, converted such Note for Common Stock; provided that, with respect to
     any Distributed Securities that are convertible, exchangeable or
     exercisable, the foregoing provision shall only apply to the extent (and so
     long as) the Distributed Securities receivable upon conversion of such Note
     would be convertible, exchangeable or exercisable, as applicable, without
     any loss of rights or privileges for a period of at least 60 days following
     conversion of such Note.

          Upon conversion of the Notes the Holders shall receive, in addition to
     the Common Stock issuable upon such conversion, any rights issued under any
     future stockholder rights plan the Company implements (notwithstanding the
     occurrence of an event causing such rights to separate from the Common
     Stock at or prior to the time of conversion).

          (d) In case the Company shall, by dividend or otherwise, distribute to
     all holders of any class of its Common Stock Cash (excluding any Cash that
     is distributed upon a merger or consolidation to which Section 4.07(f)
     applies in an aggregate amount that, combined together with (i) the
     aggregate amount of any other such distributions to all holders of any
     class

<PAGE>

                                      -53-

     of its Common Stock made exclusively in Cash within the 12 months preceding
     the date of payment of such distribution, and in respect of which no
     adjustment pursuant to this Section 4.06(d) has been made, and (ii) the
     aggregate of any Cash plus the fair market value of other consideration (as
     so determined by the Board of Directors, whose determination shall be
     conclusive, and described in a certificate filed with the Trustee) payable
     in respect of any tender offer by the Company for all or any portion of any
     class of its Common Stock concluded within the 12 months preceding the date
     of payment of such distribution, and in respect of which no adjustment
     pursuant to Section 4.06(e) has been made, exceeds 10% of the product of
     the Sale Price on the day preceding the date of declaration of such
     dividend or distribution times the number of shares of Common Stock
     outstanding on such date, then, and in each such case, immediately after
     the close of business on such date, the Conversion Rate shall be increased
     so that the same shall equal the Conversion Rate determined by multiplying
     the Conversion Rate in effect immediately prior to the Record Date by a
     fraction of which the numerator shall be such Sale Price of the Common
     Stock and the denominator shall be such Sale Price of the Common Stock less
     the amount of Cash so distributed (and not excluded as provided above)
     applicable to one share of Common Stock, such increase to be effective
     immediately prior to the opening of business on the day following the
     Record Date; provided, however, that no adjustment will be made in respect
                  --------  -------
     of any such dividends and distributions that result in the payment of any
     contingent interest to the Holders; provided, further, that, if the portion
                                         --------  -------

     of the cash so distributed applicable to one share of Common Stock is (i)
     equal to or greater than the Market Price of the Common Stock on the day
     preceding the date of declaration of such dividend or distribution or (ii)
     the Market Price of the Common Stock on the day preceding the date of
     declaration of such dividend or distribution is greater than the fair
     market value of the consideration distributed pursuant to Section 4.06(e)
     by less than $1.00, then, in lieu of the foregoing adjustment, adequate
     provision shall be made so that each Holder shall have the right to receive
     upon conversion, in addition to the shares of Common Stock, the cash and
     other consideration the Holder would have received had such Holder
     converted such Note immediately prior to such Record Date. If such dividend
     or distribution is not so paid or made, the Conversion Rate shall again be
     adjusted to be the Conversion Rate which would then be in effect if such
     dividend or distribution had not been declared. If any adjustment is
     required to be made as set forth in this Section 4.06(d) as a result of a
     distribution that is a quarterly dividend, such adjustment shall be based
     upon the amount by which such distribution exceeds the amount of the
     quarterly cash dividend permitted to be excluded pursuant hereto. If an
     adjustment is required to be made as set forth in this Section 4.06(d)
     above as a result of a distribution that is not a quarterly dividend, such
     adjustment shall be based upon the full amount of the distribution.

          (e) In case a tender offer made by the Company or any of its
     subsidiaries for all or any portion of any class of its Common Stock
     expires and such tender offer (as amended upon the expiration thereof)
     requires the payment to stockholders (based on
<PAGE>

                                      -54-

     the acceptance (up to any maximum specified in the terms of the tender
     offer) of Purchased Shares) of an aggregate consideration having a fair
     market value (as determined by the Board of Directors, whose determination
     shall be conclusive and described in a resolution of the Board of
     Directors) that, combined together with (a) the aggregate of the Cash plus
     the fair market value (as determined by the Board of Directors, whose
     determination shall be conclusive and described in a resolution of the
     Board of Directors), as of the expiration of such tender offer, of
     consideration payable in respect of any other tender offers, by the Company
     or any of its subsidiaries for all or any portion of any class of its
     Common Stock expiring within the 12 months preceding the expiration of such
     tender offer and in respect of which no adjustment pursuant to this Section
     4.06(e) has been made, and (b) the aggregate amount of any distributions to
     all holders of the Common Stock made exclusively in Cash within 12 months
     preceding the expiration of such tender offer and in respect of which no
     adjustment pursuant to Section 4.06(d) has been made (except as excluded by
     the first parenthetical phrase thereof), exceeds 10% of the product of the
     Market Price (determined as provided herein) as of the last time (the
     "Expiration Time") tenders could have been made pursuant to such tender
      ---------------
     offer (as it may be amended) times the number of shares of Common Stock
     outstanding (including any tendered shares) at the Expiration Time, then,
     and in each such case, immediately prior to the opening of business on the
     day after the date of the Expiration Time, the Conversion Rate shall be
     increased so that the same shall equal the Conversion Rate determined by
     multiplying the Conversion Rate in effect immediately prior to the
     Expiration Time by a fraction of which the numerator shall be the sum of
     (x) the fair market value (determined as aforesaid) of the aggregate
     consideration payable to stockholders based on the acceptance (up to an
     maximum specified in the terms of the tender or exchanged offer) of all
     shares validly tendered or exchanged and not withdrawn as of the Expiration
     Time (the shares deemed so accepted, up to any such maximum, being referred
     to as the "Purchased Shares") and (y) the product of the number of shares
                ----------------
     of Common Stock outstanding (less any Purchased Shares) on the Expiration
     Time and the Market Price of the Common Stock on the Trading Day next
     succeeding the Expiration Time and the denominator shall be the number of
     shares of Common Stock outstanding (including any tendered or exchanged
     shares) on the Expiration Time multiplied by the Market Price of the Common
     Stock on the Trading Day next succeeding the Expiration Time, such increase
     (if any) to become effective immediately prior to the opening of business
     on the day following the Expiration Time. If the Company is obligated to
     purchase shares pursuant to any such tender offer, but the Company is
     permanently prevented by applicable law from effecting any such purchases
     or all such purchases are rescinded, the Conversion Rate shall again be
     adjusted to be the Conversion Rate which would then be in effect if such
     tender offer had not been made.

          (f) For purposes of this Section 4.06, the number of shares of Common
     Stock at any time outstanding shall not include shares held in the treasury
     of the Company but shall include shares issuable in respect of scrip
     certificates issued in lieu of frac-
<PAGE>

                                      -55-

     tions of shares of Common Stock. The Company shall not pay any dividend or
     make any distribution on shares of Common Stock held in the treasury of the
     Company.

Section 4.07.  Miscellaneous Provisions Relating to Conversion.
               -----------------------------------------------

          (a) When Adjustment May be Deferred.  No adjustment in the Conversion
              -------------------------------
Rate need be made unless the adjustment would require an increase or decrease of
at least 1% in the Conversion Rate then in effect provided that any adjustment
that would otherwise be required to be made shall be carried forward and taken
into account in any subsequent adjustment.  Except as stated in Section 4.06,
the Conversion Rate will not be adjusted for the issuance of Common Stock or any
securities convertible into or exchangeable for Common Stock or carrying the
right to purchase any of the foregoing.  Any adjustments that are made shall be
carried forward and taken into account any subsequent adjustment.  All
calculations under Sections 4.05, 4.06 and 4.07 shall be made to the nearest
cent or to the nearest 1/10,000th of a share, as the case may be.

          (b) When No Adjustment Required.  No adjustment need be made for
              ---------------------------
rights to purchase Common Stock pursuant to a Company plan for reinvestment of
dividends or interest.  No adjustment need be made for a change in the par value
or no par value of the Common Stock.  To the extent the Notes become convertible
into cash, assets, property or securities (other than capital stock of the
Company), no adjustment need be made thereafter as to the cash, assets, property
or such securities. Interest shall not accrue on the Cash.

          (c) Notice of Adjustment.  Whenever the Conversion Rate is adjusted,
              --------------------
the Company shall promptly mail to Holders a notice of the adjustment.  The
Company shall file with the Trustee and the Conversion Agent such notice.  The
certificate shall, absent manifest error, be conclusive evidence that the
adjustment is correct.  Neither the Trustee nor any Conversion Agent shall be
under any duty or responsibility with respect to any such certificate except to
exhibit the same to any Holder desiring inspection thereof.

          (d) Voluntary Increase.  The Company may make such increases in the
              ------------------
Conversion Rate, in addition to those required by Section 4.06, as the Board of
Directors considers to be advisable to avoid or diminish any income tax to
holders of Common Stock or rights to purchase Common Stock resulting from any
dividend or distribution of stock (or rights to acquire stock) or from any event
treated as such for income tax purposes.  To the extent permitted by applicable
law, the Company may from time to time increase the Conversion Rate by any
amount for any period of time if the period is at least 20 days, the increase is
irrevocable during the period and the Board of Directors shall have made a
determination that such increase would be in the best interests of the Company,
which determination shall be conclusive.  Whenever the Conversion Rate is so
increased, the Company shall mail to Holders and file with the Trustee and the
Conversion Agent a notice of such increase.  Neither the Trustee nor any
Conversion Agent shall be under any duty or responsibility with respect to any
such certificate except to exhibit the same to any holder desiring inspection
thereof.  The Company
<PAGE>

                                      -56-

shall mail the notice at least 15 days before the date the increased Conversion
Rate takes affect. The notice shall state the increased Conversion Rate and the
period it shall be in effect.

          (e) Notice to Holders Prior to Certain Actions.  In case:
              ------------------------------------------

          (i)    the Company shall declare a dividend (or any other
     distribution) on its Common Stock that would require an adjustment in the
     Conversion Rate pursuant to Section 4.06;

          (ii)   the Company shall authorize the granting to all or
     substantially all the Holders of its Common Stock of rights or warrants to
     subscribe for or purchase any share of any class or any other rights or
     warrants to purchase Common Stock;

          (iii)  of any reclassification or reorganization of the Common Stock
     of the Company (other than a subdivision or combination of its outstanding
     Common Stock, or a change in par value, or from par value to no par value,
     or from no par value to par value), or of any consolidation or merger to
     which the Company is a party and for which approval of any shareholders of
     the Company is required, or of the sale or transfer of all or substantially
     all of the assets of the Company; or

          (iv)   of the voluntary or involuntary dissolution, liquidation or
     winding-up of the Company,

the Company shall cause to be filed with the Trustee and to be mailed to each
Holder of Notes at his address appearing on the Note register, as promptly as
possible but in any event at least 15 days prior to the applicable date
hereinafter specified, a notice stating (x) the date on which a record is to be
taken for the purpose of such dividend, distribution or rights or warrants, or,
if a record is not to be taken, the date as of which the holders of Common Stock
of record to be entitled to such dividend, distribution, or rights or warrants
are to be determined or (y) the date on which such reclassification,
consolidation, merger, sale, transfer, dissolution, liquidation or winding-up is
expected to become effective or occur, and the date as of which it is expected
that holders of Common Stock of record shall be entitled to exchange their
Common Stock for securities or other property deliverable upon such
reclassification, consolidation, merger, sale, transfer, dissolution,
liquidation or winding-up.  Failure to give such notice, or any defect therein,
shall not affect the legality or validity of such dividend, distribution,
reclassification, consolidation, merger, sale, transfer, dissolution,
liquidation or winding-up.

          (f) Effect of Reclassification, Consolidation, Merger or Sale.  If any
              ---------------------------------------------------------
of the following events occur, namely (i) any reclassification or change of
outstanding shares of Common Stock (other than a change in par value, or from
par value to no par value, or from no par value to par value, or as a result of
a subdivision or combination); (ii) any consolidation, merger or combination of
the Company with another corporation as a result of which holders of Common
Stock shall be entitled to receive stock, securities or other property or assets
(including
<PAGE>

                                      -57-

Cash) with respect to or in exchange for such Common Stock; or (iii) any sale or
conveyance of the properties and assets of the Company as, or substantially as,
an entirety to any other corporation as a result of which holders of Common
Stock shall be entitled to receive stock, securities or other property or assets
(including Cash) with respect to or in exchange for such Common Stock, then the
Company or the successor or purchasing corporation, as the case may be, shall
execute with the Trustee a supplemental indenture, providing that each Note
shall be convertible into the kind and amount of shares of stock and other
securities or property or assets (including Cash) receivable upon such
reclassification, change, consolidation, merger, combination, sale or conveyance
by a holder of a number of shares of Common Stock issuable upon conversion of
such Notes immediately prior to such reclassification, change, consolidation,
merger, combination, sale or conveyance. Such supplemental indenture shall
provide for adjustments which shall be as nearly equivalent as may be
practicable to the adjustments provided for in this Section 4.07(f).

          The Company shall cause notice of the execution of such supplemental
indenture to be mailed to each Holder of Notes, at his address appearing on the
Note register, within 20 days after execution thereof.  Failure to deliver such
notice shall not affect the legality or validity of such supplemental indenture.

          The above provisions of this Section shall similarly apply to
successive reclassifications, changes, consolidations, mergers, combinations,
sales and conveyances.

          If this Section 4.07(f) applies to any event or occurrence, Section
4.06 shall not apply.

          (g) Responsibility of Trustee.  The Trustee and any other Conversion
              -------------------------
Agent shall not at any time be under any duty or responsibility to any Holder of
Notes to either calculate the Conversion Rate or determine whether any facts
exist which may require any adjustment of the Conversion Rate, or with respect
to the nature or extent or calculation of any such adjustment when made, or with
respect to the method employed, or herein or in any supplemental indenture
provided to be employed, in making the same and shall be protected in relying
upon an Officer's Certificate with respect to the same.  The Trustee and any
other Conversion Agent shall not be accountable with respect to the validity or
value (or the kind or amount) of any shares of Common Stock, or of any
securities or property, which may at any time be issued or delivered upon the
conversion of any Note and the Trustee and any other Conversion Agent make no
representations with respect thereto.  Subject to the provisions of Article
Seven of the Indenture, neither the Trustee nor any Conversion Agent shall be
responsible for any failure of the Company to issue, transfer or deliver any
shares of Common Stock or stock certificates or other securities or property or
Cash upon the surrender of any Note for the purpose of conversion or to comply
with any of the duties, responsibilities or covenants of the Company contained
in this Section.  Without limiting the generality of the foregoing, neither the
Trustee nor any Conversion Agent shall be under any responsibility to determine
<PAGE>

                                      -58-

the correctness of any provisions contained in any supplemental indenture
entered into pursuant to Section 4.07(f) relating either to the kind or amount
of shares of stock or securities or property (including Cash) receivable by
Holders upon the conversion of their Notes after any event referred to in such
Section 4.07(f) or to any adjustment to be made with respect thereto, but,
subject to the provisions of Article Seven of the Indenture, may accept as
conclusive evidence of the correctness of any such provisions, and shall be
protected in relying upon, the Officer's Certificate (which the Company shall be
obligated to file with the Trustee prior to the execution of any such
supplemental indenture) with respect thereto.

          (h) Simultaneous Adjustments.  In the event that Sections 4.05, 4.06
              ------------------------
or 4.07 require adjustments to the Conversion Rate under more than one of
Section 4.06(a), (b), (c) or (d), and the Record Dates for the distributions
giving rise to such adjustments shall occur on the same date, then such
adjustments shall be made by applying, first, the provisions of Section 4.06(c),
second, the provisions of Section 4.06(d), third, the provisions of Section
4.06(a), and fourth, the provisions of Section 4.06(b).

          (i) Successive Adjustments.  After an adjustment to the Conversion
              ----------------------
Rate under Sections 4.05, 4.06 or 4.07, any subsequent event requiring an
adjustment under Sections 4.05, 4.06 or 4.07 shall cause an adjustment to the
Conversion Rate as so adjusted.

          (j) General Considerations.  Whenever successive adjustments to the
              ----------------------
Conversion Rate are called for pursuant to Sections 4.05, 4.06 or 4.07, such
adjustments shall be made to the Sale Price or Market Price as may be necessary
or appropriate to effectuate the intent of Sections 4.05, 4.06 or 4.07 and to
avoid unjust or inequitable results as determined in good faith by the Board of
Directors.

Section 4.08.  Optional Conversion to Semi-Annual Cash Pay Note upon Tax Event.
               ---------------------------------------------------------------

          From and after (i) the date (the "Tax Event Date") of the occurrence
                                            --------------
of a Tax Event and (ii) the date the Company exercises its option set forth in
this 4.08, whichever is later (the "Option Exercise Date"), at the option of the
                                    --------------------
Company, cash interest in lieu of future Accreted Value shall accrue at the rate
of 3.25% per annum on a restated principal amount per $1,000 original Principal
Amount (the "Restated Principal Amount") equal to its Accreted Value on the
             -------------------------
Option Exercise Date and shall be payable semi-annually on May 11 and November
11 of each year (each an "Interest Payment Date") to holders of record at the
                          ---------------------
close of business on April 27 and October 28 (each a "Regular Record Date")
                                                      -------------------
immediately preceding such Interest Payment Date. Interest will be computed on
the basis of a 360-day year comprised of twelve 30-day months and will accrue
from the most recent date on which interest has been paid or, if no interest has
been paid, from the Option Exercise Date. Within 15 days of the occurrence of a
Tax Event, the Company shall deliver a written notice of such Tax Event by
facsimile and first-class mail to the Trustee and within 15 days of their
exercise of such option the Company shall deliver a written notice of the Option
Exercise
<PAGE>

                                      -59-

Date by facsimile and first-class mail to the Trustee and by first-class mail to
the Holders of the Notes. From and after the Option Exercise Date, (i) the
Company shall be obligated to pay at Maturity or upon a Redemption Date,
Purchase Date or Fundamental Change Purchase Date, in lieu of the Principal
Amount or Accreted Value, as applicable, of a Note, the Restated Principal
Amount thereof plus accrued and unpaid interest and (ii) contingent interest
shall cease to accrue on the Notes. Notes authenticated and delivered after the
Option Exercise Date may, and shall if required by the Trustee, bear a notation
in a form approved by the Trustee as to the conversion of the Notes to Cash Pay
Notes.

Section 4.09.  Calculation of Original Issue Discount for U.S. Federal Income
               Tax Purposes.
               --------------------------------------------------------------

          The Company agrees, and each Holder and any beneficial holder of a
Note by its purchase thereof shall be deemed to agree, to treat (in the absence
of an administrative determination or judicial ruling to the contrary), for
United States federal income tax purposes, the Notes as debt instruments that
are subject to Section 1.1275-4(b) of the Treasury Regulations.  For United
States federal income tax purposes, the Company shall accrue interest with
respect to outstanding Notes as original issue discount according to the
"noncontingent bond method," set forth in Section 1.1275-4(b) of the Treasury
Regulations, based on a comparable yield of 8.88% compounded semi-annually and
the projected payment schedule attached hereto as Exhibit B.  The Company shall
file with the Trustee promptly at the end of each calendar year:  (i) a written
notice specifying the amount of original issue discount for United States
federal income tax purposes (including daily rates and accrual periods) accrued
on outstanding Notes as of the end of such year and (ii) such other specific
information relating to such original issue discount as may then be relevant
under the Internal Revenue Code of 1986, as amended from time to time, including
the amount of any adjustment made under the noncontingent bond method to account
for the amount of any difference between the amount of an actual payment and the
amount of a projected payment.

          The Company acknowledges and agrees, and each Holder and any
beneficial holder of a Note by its purchase thereof shall be deemed to
acknowledge and agree, that (i) the comparable yield means the annual yield the
Company would pay, as of the Issue Date, on a fixed-rate cash pay nonconvertible
debt security with no contingent payments, but with terms and conditions
otherwise comparable to those of the Notes; (ii) the schedule of projected
payments attached hereto as Exhibit B is determined on the basis of the
comparable yield and an assumption of linear growth of the stock price and a
constant dividend yield; (iii) the comparable yield and the schedule of
projected payments are not determined for any purpose other than for the
determination of interest accruals and adjustments thereof in respect of the
Notes for United States federal income tax purposes; and (iv) the comparable
yield and the schedule
<PAGE>

                                      -60-

of projected payments do not constitute a projection or representation regarding
the future stock price or the amounts payable on the Notes.

Section 4.10.  Payment of Interest.
               -------------------

          (a) Paying Agent To Hold Money in Trust.  Prior to 11:00 a.m.  (New
              -----------------------------------
York City time) on any applicable Interest Payment Date, the Company shall
deposit with the Paying Agent (or if the Company or a Subsidiary is acting as
Paying Agent, segregate and hold in trust for the benefit of the Persons
entitled thereto) a sum sufficient to pay semi-annual or contingent interest
when due. The Company shall require each Paying Agent (other than the Trustee)
to agree in writing that the Paying Agent shall hold in trust for the benefit of
Holders or the Trustee all money held by the Paying Agent for the payment of
principal or interest on the Notes and shall notify the Trustee of any default
by the Company in making any such payment. If the Company or a Subsidiary acts
as Paying Agent, it shall segregate the money held by it as Paying Agent and
hold it as a separate trust fund. The Company at any time may require a Paying
Agent to pay all money held by it to the Trustee and to account for any funds
disbursed by the Paying Agent. Upon complying with this Section, the Paying
Agent shall have no further liability for the money delivered to the Trustee.

          (b) Holder Lists.  The Trustee shall preserve in as current a form as
              ------------
is reasonably practicable the most recent list available to it of the names and
addresses of Holders.  If the Trustee is not the Registrar, the Company shall
furnish, or cause the Registrar to furnish, to the Trustee, in writing at least
five Business Days before each Interest Payment Date and at such other times as
the Trustee may request in writing, a list in such form and as of such date as
the Trustee may reasonably require of the names and addresses of Holders.

          (c) Payment of Interest; Interest Rights Preserved.  (i) Semi-annual
              ----------------------------------------------
or contingent interest on any Note that is payable, and is punctually paid or
duly provided for, on any Interest Payment Date shall be paid to the Person in
whose name that Note is registered at the close of business on the Regular
Record Date or accrual date, as the case may be, for such interest at the office
or agency of the Company maintained for such purpose.  Each installment of semi-
annual or contingent interest on any Note shall be paid in same-day funds by
transfer to an account maintained by the payee located inside the United States.
In the case of a Global Note, semi-annual or contingent interest payable on any
applicable payment date will be paid to the depository, with respect to that
portion of such Global Note held for its account by Cede & Co.  for the purpose
of permitting such party to credit the interest received by it in respect of
such Global Note to the accounts of the beneficial owners thereof.

          (ii)   Except as otherwise specified with respect to the Notes, any
semi-annual or contingent interest on any Note that is payable, but is not
punctually paid or duly provided for, within 30 days following any applicable
payment date (herein called "Defaulted Interest", which term shall include any
                             ------------------
accrued and unpaid interest that has accrued on such defaulted amount in
accordance with paragraph 1 of the Notes), shall forthwith cease to be
<PAGE>

                                      -61-

payable to the registered Holder thereof on the relevant Regular Record Date or
accrual date, as the case may be, by virtue of having been such Holder, and such
Defaulted Interest may be paid by the Company, at its election in each case, as
provided in clause (A) or (B) below.

          (A) The Company may elect to make payment of any Defaulted Interest to
     the Persons in whose names the Notes are registered at the close of
     business on a date for the payment of such Defaulted Interest (the "Special
                                                                         -------
     Record Date"), which shall be fixed in the following manner: The Company
     -----------
     shall notify the Trustee in writing of the amount of Defaulted Interest
     proposed to be paid on each Note and the date of the proposed payment
     (which shall not be less than 20 days after such notice is received by the
     Trustee), and at the same time the Company shall deposit with the Trustee
     an amount of money equal to the aggregate amount proposed to be paid in
     respect of such Defaulted Interest or shall make arrangements satisfactory
     to the Trustee for such deposit on or prior to the date of the proposed
     payment, such money when deposited to be held in trust for the benefit of
     the Persons entitled to such Defaulted Interest as in this clause provided.
     Thereupon the Trustee shall fix a Special Record Date for the payment of
     such Defaulted Interest which shall be not more than 15 days and not less
     than 10 days prior to the date of the proposed payment and not less than 10
     days after the receipt by the Trustee of the notice of the proposed
     payment.  The Trustee shall promptly notify the Company of such Special
     Record Date and, in the name and at the expense of the Company, shall cause
     notice of the proposed payment of such Defaulted Interest and the Special
     Record Date therefor to be mailed, first-class postage prepaid, to each
     Holder of Notes at his address as it appears on the list of Holders
     maintained pursuant to this Supplemental Indenture not less than 10 days
     prior to such Special Record Date.  Notice of the proposed payment of such
     Defaulted Interest and the Special Record Date therefor having been mailed
     as aforesaid, such Defaulted Interest shall be paid to the Persons in whose
     names the Notes are registered at the close of business on such Special
     Record Date and shall no longer be payable pursuant to the following clause
     (B).

          (B) Alternatively, the Company may make payment of any Defaulted
     Interest on the Notes in any other lawful manner not inconsistent with the
     requirements of any Notes exchange on which such Notes may be listed, and
     upon such notice as may be required by such exchange, if, after notice
     given by the Company to the Trustee of the proposed payment pursuant to
     this clause, such manner of payment shall be deemed practicable by the
     Trustee.

          Subject to the foregoing provisions of this Section 4.10, each Note
delivered under this Supplemental Indenture upon registration of transfer of or
in exchange for or in lieu of any other Note shall carry the rights to semi-
annual or contingent interest accrued and unpaid to, and to accrue, which were
carried by such other Note.
<PAGE>

                                      -62-

                                 ARTICLE FIVE

                                 Miscellaneous

Section 5.01.  Events of Default
               -----------------

          The first three sentences of Section 6.02 of the Indenture are
replaced by the following:

          If an Event of Default (other than an Event of Default with respect to
the Company resulting from subclause (7) or (8) of the definition of "Event of
Default") shall have occurred and be continuing under this Indenture, the
Trustee by notice to the Company, or the Holders of at least 25 percent in
Principal Amount of the Notes then outstanding by notice to the Company and the
Trustee, may declare the Accreted Value of, plus accrued and unpaid interest, if
any, on the Notes to be due and payable immediately. Upon such declaration of
acceleration, the amounts due and payable on the Securities will be due and
payable immediately. If an Event of Default with respect to the Company
specified in subclause (7) or (8) of the definition of "Event of Default" occurs
such amounts will ipso facto become and be immediately due and payable without
any declaration, notice or other act on the part of the Trustee and the Company
or any Holder.

Section 5.02.  Defeasance.
               ----------

          Section 8.01 of the Indenture is amended by deleting paragraphs (a),
(b), (c) and (d) thereof and inserting "[Intentionally omitted.]".

Section 5.03.  Amendments.
               ----------

          Section 10.02 of the Indenture is amended:

               (i)    by adding the following text after clause (8); "(9) make
     any change that adversely affects the right to convert any "Security.",

               (ii)   by deleting "; or" at the end of clause (7),

               (iii)  by deleting the period at the end of clause (8) and adding
     "; or",

               (iv)   by adding the words "or securities" after the word "money"
     in clause (8), and

               (v)    by replacing clause (2) with "reduce the Accreted Value or
     the rate of accretion of principal or the rate of any interest, or change
     the time for payment of any interest, on any Security."

Section 5.04.  Governing Law.
               -------------

          The laws of the State of New York shall govern this Supplemental
Indenture, the Securities of each Series and the Guarantees.

Section 5.05.  No Adverse Interpretation of Other Agreements.
               ---------------------------------------------

          This Supplemental Indenture may not be used to interpret another
indenture, loan or debt agreement of the Company or a Subsidiary.  Any such
indenture, loan or debt agreement may not be used to interpret this Supplemental
Indenture.

Section 5.06.  No Recourse Against Others.
               --------------------------

          All liability described in paragraph 19 of the Notes of any director,
officer, employee or stockholder, as such, of the Company or any Guarantor is
waived and released.

Section 5.07.  Successors and Assigns.
               ----------------------

          All covenants and agreements of the Company and the Guarantors in this
Supplemental Indenture and the Notes shall bind its successors and assigns.  All
agreements of the Trustee in this Supplemental Indenture shall bind its
successors and assigns.
<PAGE>

                                      -63-

Section 5.08.  Duplicate Originals.
               -------------------

          The parties may sign any number of copies of this Supplemental
Indenture.  Each signed copy shall be an original, but all of them together
represent the same agreement.

Section 5.09.  Severability.
               ------------

          In case any one or more of the provisions contained in this
Supplemental Indenture or in the Notes shall for any reason be held to be
invalid, illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provisions of this Supplemental
Indenture or of the Notes.
<PAGE>

                                  SIGNATURES

          IN WITNESS WHEREOF, the parties have caused this Supplemental
Indenture to be duly executed, all as of the date first above written.

                              D.R. HORTON, INC.

                              By:
                                 --------------------------------------------
                                 Name:
                                 Title:


                              GUARANTORS:

                              C. Richard Dobson Builders, Inc.
                              CHI Construction Company
                              CHTEX of Texas, Inc.
                              Continental Homes, Inc.
                              Continental Homes of Florida, Inc.
                              Continental Residential, Inc.
                              D.R. Horton, Inc.-Birmingham
                              D.R. Horton, Inc.-Chicago
                              D.R. Horton, Inc.-Denver
                              D.R. Horton, Inc.-Greensboro
                              D.R. Horton, Inc.-Jacksonville
                              D.R. Horton, Inc.-Louisville
                              D.R. Horton, Inc.-Minnesota
                              D.R. Horton, Inc.-New Jersey
                              D.R. Horton, Inc.-Portland
                              D.R. Horton, Inc.-Sacramento
                              D.R. Horton, Inc.-Torrey
                              D.R. Horton Los Angeles Holding Company, Inc.
                              D.R. Horton San Diego Holding Company, Inc.
                              DRH Cambridge Homes, Inc.
                              DRH Construction, Inc.
                              DRH Regrem I, Inc.
                              DRH Regrem II, Inc.
                              DRH Regrem III, Inc.
                              DRH Regrem IV, Inc.
                              DRH Regrem V, Inc.
                              DRH Southwest Construction, Inc.
                              DRH Title Company of Colorado, Inc.
                              DRH Tucson Construction, Inc.
                              DRHI, Inc.
                              KDB Homes, Inc.
                              Meadows I, Ltd.
                              Meadows VIII, Ltd.
                              Meadows IX, Inc.
                              Meadows X, Inc.

                              By:
                                 ------------------------------------------
                              Name:  Samuel R. Fuller
                              Title:  Treasurer


                              SGS COMMUNITIES AT GRANDE QUAY, LLC

                              By: Meadows IX, Inc., a member


                              By:
                                 ------------------------------------------
                              Name:  Samuel R. Fuller
                              Title:  Treasurer

                              and

                              By: Meadows X, Inc., a member


                              By:
                                 ------------------------------------------
                              Name:  Samuel R. Fuller
                              Title:  Treasurer


                              D.R. HORTON MANAGEMENT COMPANY, LTD.
                              D.R. HORTON - TEXAS, LTD.
                              DRH Regrem VI, LP
                              DRH Regrem VII, LP

                              By: Meadows I, Ltd.,
                              its general partner

                              By:
                                 ------------------------------------------
                              Name:  Samuel R. Fuller
                              Title:  Treasurer


                              CONTINENTAL HOMES OF TEXAS, L.P.

                              By: CHTEX of Texas, Inc.,
                              its general partner

                              By:
                                 ------------------------------------------
                              Name:  Samuel R. Fuller
                              Title:  Treasurer


                              DRH Cambridge Homes, LLC
                              DRH Regrem VIII, LLC

                              By: D.R. Horton, Inc.-Chicago,
                                  a member

                              By:
                                 ------------------------------------------
                              Name:  Samuel R. Fuller
                              Title:  Treasurer


                              Meadows II, Ltd.
                              CH Investments of Texas, Inc.

                              By:
                                 ------------------------------------------
                              Name:  William Peck
                              Title:  President


                              AMERICAN STOCK TRANSFER & TRUST COMPANY,
                              as Trustee

                              By:
                              Name:
                              Title:

<PAGE>

                                                                       EXHIBIT A

                       [FORM OF FACE OF GLOBAL SECURITY]


          This security is a global security within the meaning of the Indenture
hereinafter referred to and is registered in the name of a depository or a
nominee of a depository or a successor depository.  This security is not
exchangeable for securities registered in the name of a person other than the
depository or its nominee except in the limited circumstances described in the
Indenture, and no transfer of this security (other than a transfer of this
security as a whole by the depository to a nominee of the depository or by a
nominee of the depository to the depository or another nominee of the
depository) may be registered except in the limited circumstances described in
the Indenture.

          Unless this certificate is presented by an authorized representative
of The Depository Trust Company, a New York Corporation ("DTC"), to the issuer
or its agent for registration of transfer, exchange, or payment, and any
certificate issued is registered in the name of Cede & Co. or in such other name
as is requested by an authorized representative of DTC (and any payment is made
to Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), any transfer, pledge or other use hereof for value or
otherwise by or to any person is wrongful inasmuch as the registered owner
hereof, Cede & Co., has an interest herein.
<PAGE>

                                      -2-

                               D.R. HORTON, INC.

                  ZERO COUPON CONVERTIBLE SENIOR NOTE DUE 2021

No.__________________                          CUSIP: 23331AAH2
Issue Date:  May 11, 2001                      ISIN:  US23331AAH23
Issue Price:  $524.78
(for each $1,000 Principal
Amount at Final Maturity)



          D.R. Horton, Inc., a Delaware corporation, promises to pay to
__________ or registered assigns, on May 11, 2021 the Principal Amount of
__________ Dollars ($__________).

          This Note shall not bear periodic interest except as specified on the
other side of this instrument.  This Note shall accrete as specified on the
other side of this Note.  This Note is convertible as specified on the other
side of this Note.

          Additional provisions of this Note are set forth on the other side of
this Note.
<PAGE>

                                      -3-

          IN WITNESS WHEREOF, D.R. Horton, Inc. has caused this instrument to be
duly executed.

                              D.R. HORTON, INC.

                              By: _____________________________
                                  Name:

                                  Title:

Attest:

By: _____________________
    Name:
    Title:

Dated:

American Stock Transfer & Trust Company,
as Trustee, certifies that this is one
of the Securities referred to in the
within mentioned Indenture

Date:


By: _____________________
    Name:
    Title:
<PAGE>

                                      -4-

                   [FORM OF REVERSE SIDE OF GLOBAL SECURITY]

                               D.R. HORTON, INC.

                  ZERO COUPON CONVERTIBLE SENIOR NOTE DUE 2021

          1.  INTEREST

          This Note shall not bear periodic interest, except as specified in
this paragraph and in paragraphs 5 and 11 hereof.  If the Principal hereof or
any portion of such Principal is not paid when due (whether upon acceleration
pursuant to the Indenture, upon the date set for payment of the Redemption Price
pursuant to paragraph 6 hereof, upon the date set for payment of a Purchase
Price or Fundamental Change Purchase Price pursuant to paragraph 7 hereof or
upon the Final Maturity of this Note) or if interest (including contingent
interest, if any) due hereon or any portion of such interest is not paid when
due in accordance with paragraph 5 or 11 hereof, then in each such case the
overdue amount shall bear interest at the rate of 3.25% per annum, compounded
semiannually (to the extent that the payment of such interest shall be legally
enforceable), which interest shall accrue from the date such overdue amount was
due to the date payment of such amount, including interest thereon, has been
made or duly provided for.  All such interest shall be payable on demand.  The
accrual of such interest on overdue amounts shall be in lieu of, and not in
addition to, the continued accretion.

          The Notes shall increase in Accreted Value commencing on the Issue
Date.

          "Accreted Value" means, at any date of determination, (1) prior to
such time as this Note is converted to a Cash Pay Note, the sum of (x) the Issue
Price of this Note and (y) the portion of the excess of the Principal Amount of
this Note over the Issue Price which shall have been amortized by the Company in
accordance with GAAP through such date, such amount to be so amortized on a
daily basis and compounded semi-annually on each May 11 and November 11 at the
rate of 3.25% per annum from the Issue Date through the date of determination
compounded on the basis of a 360-day year and twelve 30-day months and (2) at or
after such time as this Note is converted to a Cash Pay Note, its Restated
Principal Amount.

          2.  METHOD OF PAYMENT

          Subject to the terms and conditions of the Indenture, the Company
shall make payments in respect of the Notes to the Persons who are registered
Holders of Notes at the close of business on the Business Day preceding the
Redemption Date or Final Maturity, as the case may be, or at the close of
business on a Purchase Date or Fundamental Change Purchase Date, as the case may
be.  Holders must surrender Notes to a Paying Agent to collect such payments in
respect of the Notes.  The Company shall pay cash amounts in money of the United
States that at the time of payment is legal tender for payment of public and
private debts.  However, the Company may make such cash payments by check
payable in such money.

          3.   PAYING AGENT, CONVERSION AGENT, BID AGENT AND REGISTRAR

          Initially, American Stock Transfer & Trust Company (the "Trustee"),
shall act as Paying Agent, Conversion Agent, Bid Agent and Registrar.  The
Company may  appoint
<PAGE>

                                      -5-

and change any Paying Agent, Conversion Agent, Bid Agent, Registrar or co-
registrar without notice, other than notice to the Trustee except that the
Company will maintain at least one Paying Agent in the State of New York, City
of New York, Borough of Manhattan, which shall initially be an office or agency
of the Trustee. The Company or any of its Subsidiaries or any of their
Affiliates may act as Paying Agent, Conversion Agent, Bid Agent, Registrar or
co-registrar.

          4.  INDENTURE

          The Company issued the Notes under an Indenture dated as of June 9,
1997 among the Company, the Guarantors and the Trustee, as supplemented (the
"Indenture"). The terms of the Notes and the Guarantees include those stated in
the Indenture and those made part of the Indenture by reference to the Trust
Indenture Act of 1939 ("TIA") as in effect on the date of the Indenture. The
Notes and the Guarantees are subject to all such terms, and Holders are referred
to the Indenture and the Act for a statement of them. Capitalized terms not
defined herein have the meanings given to those terms in the Indenture.

          The Company will furnish to any Holder upon written request and
without charge a copy of the Indenture and the applicable Authorizing Resolution
or supplemental indenture. Requests may be made to: D.R. Horton, Inc., 1901
Ascension Blvd., Suite 100, Arlington, Texas 76006, Attention: Chief Financial
Officer.

          5.  CONTINGENT INTEREST

          Subject to the accrual and Record Date provisions specified in this
paragraph 5, the Company shall pay contingent interest to the Holders during any
six-month period (a "Contingent Interest Period") from May 11 to November 10 and
from November 11 to May 10, commencing after May 11, 2003, if the average Note
Price for the Five-Day Period with respect to such Contingent Interest Period
equals 120% or more of the Accreted Value of such Note to the Trading Day
immediately preceding the first day of the relevant Contingent Interest Period.

          The amount of contingent interest payable per $1,000 Principal Amount
hereof in respect of any Contingent Interest Period shall equal the greater of
(x) Cash Dividends paid by the Company per share of Common Stock during that
Contingent Interest Period multiplied by the number of shares of Common Stock
into which $1,000 Principal Amount hereof is convertible pursuant to paragraph
10 hereof as of the accrual date for such contingent interest and (y) 0.125% of
the average Note Price for the Five-Day Period with respect to such Contingent
Interest Period, except that no contingent interest payment shall exceed 1.62%
of the Accreted Value of the Notes at the beginning of the relevant Contingent
Interest Period.

<PAGE>

                                      -6-

          Contingent interest, if any, will accrue and be payable to Holders as
of the Record Date for the related Cash Dividend or, if no Cash Dividend is paid
by the Company during a Contingent Interest Period, to Holders as of the 15th
day preceding the last day of the relevant Contingent Interest Period. Such
payments shall be paid on the payment date of the related Cash Dividend or, if
no Cash Dividend is paid by the Company during a Contingent Interest Period, on
the last day of the relevant Contingent Interest Period. In addition, on any
Purchase Date, Fundamental Change Purchase Date or Redemption Date that occurs
during a Contingent Interest Period for which a Holder is entitled to contingent
interest pursuant to clause (y) of the preceding paragraph, contingent interest
will be payable to such Holder in an amount equal to the amount that would have
been otherwise payable to such Holder on the last day of such Contingent
Interest Period divided by the actual number of days from the first day of such
Contingent Interest Date to the Purchase Date, Fundamental Change Purchase Date
or Redemption Date, as the case may be, using a 360-day year composed of twelve
30-day months.

          "Five-Day Period" means, with respect to any Contingent Interest
Period, the five Trading Days ending on the second Trading Day immediately
preceding the first day of such Contingent Interest Period; provided, however,
if the Company shall have declared a Cash Dividend on its Common Stock that is
payable during such Contingent Interest Period but for which the Record Date for
determining stockholders entitled thereto precedes the first day of such
Contingent Interest Period, then "Five-Day Period" means, with respect to such
Contingent Interest Period, the five Trading Days ending on the second Trading
Day immediately preceding such Record Date.

          "Cash Dividends" means all cash dividends on the Common Stock (whether
regular, periodic, extraordinary, special, nonrecurring or otherwise) as
declared by the Company's Board of Directors as part of its cash dividend
payment practices.

          "Note Price" means, as of any date of determination, the average of
the secondary market bid quotations per Note obtained by the Bid Agent for $10
million Principal Amount of Notes at approximately 4:00 p.m. (New York City
time) on such determination date from three recognized securities dealers in The
City of New York (none of which shall be an Affiliate of the Company) selected
by the Company; provided, however, if (a) at least three such bids are not
obtained by the Bid Agent or (b) in the Company's reasonable judgment, the bid
quotations are not indicative of the secondary market value of the Notes as of
such determination date, then the Note Price for such determination date shall
equal (i) the Conversion Rate in effect as of such determination date multiplied
by (ii) the average Sale Price of Common Stock for the five Trading Days ending
on such determination date, appropriately adjusted to take into account the
occurrence, during the period commencing on the first of such Trading Days
during such five Trading Day period and ending on such determination date, of
any event described in Section 4.06(a), 4.06(b) or 4.06(c) (subject to the
conditions set forth in Sections 4.07(a) and 4.07(b)) of the Indenture.
<PAGE>

                                      -7-

          Upon determination that Holders will be entitled to receive contingent
interest which may become payable during a Contingent Interest Period, on or
prior to the first day of such Contingent Interest Period, the Company shall
issue a press release and publish such information on its web site if such web
site exists.

          6.  REDEMPTION AT THE OPTION OF THE COMPANY

          No sinking fund is provided for the Notes.  Beginning on May 11, 2003,
the Notes are redeemable as a whole, or from time to time in part, at any time
at the option of the Company at their Accreted Value.

          The table below shows the Accreted Value of a Note on the dates shown
below and at Final Maturity. The Accreted Value, in dollars, of a Note per
$1,000 Principal Amount redeemed between such dates shall include an additional
amount reflecting the increase in Accreted Value since the next preceding date
in the table to but excluding the actual Redemption Date.

<TABLE>
<CAPTION>

                                                                                       Redemption Total
                                          Issue                Increase in Accreted     Accreted Value
Redemption Date                           Price(1)              Value at 3.25%(2)       (1+2)
-------------------------------------     -------------        --------------------    ----------------
<S>                                    <C>               <C>                     <C>

May 11, 2003.........................         524.78                      34.95              559.73
May 11, 2004.........................         524.78                      53.29              578.07
May 11, 2005.........................         524.78                      72.23              597.01
May 11, 2006.........................         524.78                      91.79              616.57
May 11, 2007.........................         524.78                     111.99              636.77
May 11, 2008.........................         524.78                     132.86              657.64
May 11, 2009.........................         524.78                     154.40              679.18
May 11, 2010.........................         524.78                     176.65              701.43
May 11, 2011.........................         524.78                     199.64              724.42
May 11, 2012.........................         524.78                     223.37              748.15
May 11, 2013.........................         524.78                     247.88              772.66
May 11, 2014.........................         524.78                     273.20              797.98
May 11, 2015.........................         524.78                     299.34              824.12
May 11, 2016.........................         524.78                     326.35              851.13
May 11, 2017.........................         524.78                     354.23              879.01
May 11, 2018.........................         524.78                     383.03              907.81
May 11, 2019.........................         524.78                     412.78              937.56
May 11, 2020.........................         524.78                     443.49              968.27
May 11, 2021.........................         524.78                     475.22            1,000.00

</TABLE>

          If this Note has been converted to Cash Pay Notes, the Redemption
Price will be equal to the Restated Principal Amount plus accrued and unpaid
interest from the date of
<PAGE>

                                      -8-

such conversion to the Redemption Date; but in no event will this Note be
redeemable before May 11, 2003.

          In addition to the Redemption Price payable with respect to all Notes
or portions thereof to be redeemed as of a Redemption Date, the Holders of such
Notes (or portions thereof) shall be entitled to receive accrued and unpaid
contingent interest, if any, with respect thereto, which contingent interest
shall be paid in cash on the Redemption Date.

          7.   PURCHASE BY THE COMPANY AT THE OPTION OF THE HOLDER; PURCHASE AT
               THE OPTION OF THE HOLDER UPON A FUNDAMENTAL CHANGE

          Subject to the terms and conditions of the Indenture, a Holder of
Notes shall have the option to require the Company to purchase the Notes held by
such Holder on the following Purchase Dates and at the following Purchase Prices
per $1,000 Principal Amount, plus, in the case of purchases on May 11, 2008 and
May 11, 2013, accrued and unpaid contingent interest, if any, upon delivery of a
Purchase Notice containing the information set forth in the Indenture, from the
opening of business on the date that is 30 Business Days prior to such Purchase
Date until the close of business on such Purchase Date and upon delivery of the
Notes to the Paying Agent by the Holder as set forth in the Indenture. For any
Purchase Date after May 11, 2003, such Purchase Prices may be paid, at the
option of the Company, in cash or by the issuance and delivery of shares of
Common Stock, or in any combination thereof. The Company will pay the Purchase
Price for any purchase on May 11, 2003 only in cash.


          Purchase Date                             Purchase Price
          -------------                             --------------
          May 11, 2003.............................     $559.73
          May 11, 2008.............................     $657.64
          May 11, 2013.............................     $772.66


          Notes in denominations larger than $1,000 of Principal Amount may be
purchased in part, but only in multiples of $1,000 of Principal Amount.

          If prior to a Purchase Date this Note has been converted to a Cash Pay
Note, the Purchase Price will be equal to the Restated Principal Amount plus
accrued and unpaid interest from the date of conversion to the Purchase Date.

          If a Fundamental Change shall occur at any time prior to May 11, 2003,
each Holder shall have the right, at such Holder's option and subject to the
terms and conditions of the Indenture, to require the Company to purchase such
Holder's Notes on the Business Day that is 95 days after the date of the
Fundamental Change for a Fundamental Change Purchase
<PAGE>

                                      -9-

Price equal to Accreted Value to the Fundamental Change Purchase Date. If, prior
to the Fundamental Change Purchase Date, the Notes were converted to Cash Pay
Notes, the Fundamental Change Purchase Price will be equal to the Restated
Principal Amount plus accrued and unpaid interest from the date of conversion to
the Fundamental Change Purchase Date, which Fundamental Change Purchase Price
shall be paid at the option of the Company in cash or by the issuance and
delivery of shares of Common Stock or in any combination thereof. Notes in
denominations larger than $1,000 of Principal Amount may be redeemed in part in
connection with a Fundamental Change, but only in multiples of $1,000 of
Principal Amount.

          In addition to the Purchase Price or Fundamental Change Purchase
Price, as the case may be, payable with respect to all Notes or portions thereof
to be purchased as of the Purchase Date or the Fundamental Change Purchase Date,
as the case may be, the Holders of such Notes (or portions thereof) shall be
entitled to receive accrued and unpaid contingent interest, if any, with respect
thereto, which contingent interest shall be paid in cash promptly following the
later of the Purchase Date or the Fundamental Change Purchase Date, as the case
may be, and the time of delivery of such Notes to the Paying Agent pursuant to
the Indenture.

          Holders have the right to withdraw any Purchase Notice or Fundamental
Change Purchase Notice, as the case may be, by delivery to the Paying Agent of a
written notice of withdrawal in accordance with the provisions of the Indenture.

          If cash (and/or Common Stock if permitted under the Indenture)
sufficient to pay a Fundamental Change Purchase Price or cash (and/or Common
Stock if permitted under the Indenture) sufficient to pay a Purchase Price, as
the case may be, of, together with any accrued and unpaid contingent interest
with respect to, all Notes or portions thereof to be purchased as of the
Purchase Date or the Fundamental Change Purchase Date, as the case may be, is
deposited with the Paying Agent on the Business Day following the Purchase Date
or the Fundamental Change Purchase Date, as the case may be, such Notes will
cease to accrete and interest (including contingent interest), if any, will
cease to accrue on such Notes (or portions thereof) on and after such date, and
the Holder thereof shall have no other rights as such (other than the right to
receive the Purchase Price or Fundamental Change Purchase Price, as the case may
be, and accrued and unpaid contingent interest, if any, upon surrender or such
Note).

          8.  NOTICE OF REDEMPTION AT THE OPTION OF THE COMPANY

          Notice of redemption at the option of the Company shall be mailed at
least 30 days but not more than 60 days before the Redemption Date to each
Holder of Notes to be redeemed at the Holder's registered address.  If money
sufficient to pay the Redemption Price of, together with any accrued and unpaid
contingent interest with respect to, all Notes (or portions thereof) to be
redeemed on the Redemption Date is deposited with the Paying Agent prior to or
on the Redemption Date, on and after such date Accreted Value and interest
(in-
<PAGE>

                                     -10-

cluding contingent interest), if any, ceases to accrue on such Notes or portions
thereof. Notes in denominations larger than $1,000 Principal Amount may be
redeemed in part but only in multiples of $1,000 or Principal Amount.

          9.  [INTENTIONALLY OMITTED]

          10.  CONVERSION

          A Holder of a Note may convert this Note for Common Stock at any time
on or before the close of business on May 11, 2021 if at least one of the
following conditions is satisfied:

          (a) the Twenty-Day Average Price on the Conversion Date is at least
     110% or more of the Accreted Conversion Price;

          (b) the credit rating assigned to the Notes by Moody's Investors
     Service, Inc. and Standard & Poor's Ratings Services are at least two
     levels lower than the initial credit ratings assigned by Moody's Investors
     Service, Inc. and Standard & Poor's Ratings Services (for the avoidance of
     doubt, the foregoing reference to "levels" is intended to refer to any
     subcategories such rating agencies employ in their announced ratings of
     securities, including plusses and minuses, but not including any
     characterization as to likelihood of future action in respect of
     securities' ratings);

          (c) the Notes have been called for redemption by the Company, at any
     time prior to the close of business on the Business Day prior to the
     Redemption Date; or

          (d) the Company elects (i) to distribute to all holders of Common
     Stock rights entitling them to purchase, for a period expiring within 60
     days after the date of such distribution, Common Stock at less than the
     Sale Price at the time of such distribution, (ii) to distribute to all
     holders of Common Stock assets, debt, securities or rights to purchase
     securities of the Company, which distribution has a per share value as
     determined by the Company's Board of Directors exceeding 15% of the Sale
     Price of the Common Stock on the day preceding the declaration date for
     such distribution, or (iii) in the event the Company is a party to a
     consolidation, merger or binding share exchange pursuant to which the
     Common Stock would be converted into cash, securities or other property, at
     any time from and after the date which is 15 days prior to the date the
     Company announces the anticipated effective time until 15 days after the
     actual effective date of such transaction.

          In the case of the foregoing clauses (d)(i) and (ii), the Company must
notify the Holders of Notes at least 20 days prior to the Ex-Dividend Date for
such distribution.  Once the Company has given such notice, Holders may
surrender their Notes for conversion at any
<PAGE>

                                     -11-

time thereafter until the earlier of the close of business on the Business Day
prior to the Ex-Dividend Date or the Company's announcement that such
distribution will not take place.

          If this Note is called for redemption, the Holder may convert it at
any time before the close of business on the last Business Day prior to the
Redemption Date.  A Note in respect of which a Holder has delivered a notice of
exercise of the option to require the Company to purchase such Note or to
purchase such Note in the event of a Fundamental Change may be converted only if
the notice of exercise is withdrawn in accordance with the terms of the
Indenture.

          The initial Conversion Rate is 17.4927 shares of Common Stock per Note
with a $1,000 Principal Amount subject to adjustment in certain events described
in the Indenture. The Company shall deliver cash or a check in lieu of any
fractional share of Common Stock.

          In the event the Company exercises its option pursuant to Section 4.08
of the Indenture to convert the Notes to Cash Pay Notes, the Holder will be
entitled on conversion to receive the same number of shares of Common Stock such
Holder would have received if the Company had not exercised such option.  If the
Company exercises such option, Notes surrendered for conversion during the
period from the close of business on any Regular Record Date next preceding any
Interest Payment Date to the opening of business of such Interest Payment Date
(except Notes with respect to which the Company has mailed a notice of
redemption) must be accompanied by payment of an amount equal to the interest
thereon that the registered Holder is to receive.  Except where Notes
surrendered for conversion must be accompanied by payment as described above, no
interest on converted Notes will be payable by the Company on any Interest
Payment Date subsequent to the date of conversion.

          Notes surrendered for conversion during the period from the close of
business on any date on which contingent interest accrues to the opening of
business on the date on which such contingent interest is payable (except Notes
with respect to which the Company has mailed a notice of redemption) must be
accompanied by payment of an amount equal to the contingent interest with
respect thereto that the registered Holder is to receive.  Except where Notes
surrendered for conversion must be accompanied by payment as described above, no
contingent interest on converted Notes will accrue after the date of conversion.

          To convert this Note a Holder must (1) complete and manually sign the
conversion notice on the back of this Note (or complete and manually sign a
facsimile of such notice) and deliver such notice to the Conversion Agent at the
office maintained by the Conversion Agent for such purpose, (2) surrender this
Note to the Conversion Agent, (3) furnish appropriate endorsements and transfer
documents if required by the Conversion Agent, the Company or the Trustee and
(4) pay any transfer or similar tax, if required.
<PAGE>

                                     -12-

          A Holder may convert a portion of this Note only if the Principal
Amount of such portion is $1,000 or a multiple of $1,000. No payment or
adjustment shall be made for dividends on the Common Stock except as provided in
the Indenture. On conversion of this Note, that portion of Accreted Value (or,
interest, if the Company has exercised its option provided for in paragraph 11
hereof) attributable to the period from the Issue Date (or, if the Company has
exercised the option referred to in paragraph 11 hereof, the later of (x) the
date of such exercise and (y) the date on which interest was last paid) to the
Conversion Date and (except as provided below) accrued contingent interest with
respect to the converted portion of this Note shall not be canceled,
extinguished or forfeited, but rather shall be deemed to be paid in full to the
Holder thereof through the delivery of the Common Stock (together with any cash
payment in lieu of fractional shares) in exchange for the portion of this Note
being converted pursuant to the terms hereof; and the fair market value of such
shares of Common Stock (together with any such cash payment in lieu of
fractional shares) shall be treated as issued, to the extent thereof, first in
exchange for Accreted Value (or interest, if the Company has exercised its
option provided for in paragraph 11 hereof) accrued through the Conversion Date
and accrued contingent interest, and the balance, if any, of such fair market
value of such Common Stock (and any such cash payment) shall be treated as
issued in exchange for the Issue Price of the Note being converted pursuant to
the provisions hereof.

          11.  TAX EVENT

          (a) From and after (i) the date (the "Tax Event Date") of the
occurrence of a Tax Event and (ii) the date the Company exercises such option,
whichever is later (the "Option Exercise Date"), at the option of the Company,
all of the Notes will cease to accrete, and cash interest shall accrue at the
rate of 3.25% per annum on the restated principal amount (the "Restated
Principal Amount"), equal to the Accreted Value on the Option Exercise Date, and
shall be payable semiannually on May 11  and November 11 of each year (each an
"Interest Payment Date") to holders of record at the close of business on April
27 or October 28 (each a "Regular Record Date") immediately preceding such
Interest Payment Date.  Interest will be computed on the basis of a 360-day year
comprised of twelve 30-day months and will accrue from the most recent date to
which interest has been paid or, if no interest has been paid, from the Option
Exercise Date.

          (b) Interest on any Note that is payable, and is punctually paid or
duly provided for, on any Interest Payment Date shall be paid to the person in
whose name that Note is registered at the close of business on the Regular
Record Date for such interest at the office or agency of the Company maintained
for such purpose.  Each installment of interest on any Note shall be paid in
same-day funds by transfer to an account maintained by the payee located inside
the United States.
<PAGE>

                                     -13-

          (c) From and after the Option Exercise Date, contingent interest
provided for in paragraph 5 hereof shall cease to accrue on this Note.

          12.  DEFAULTED INTEREST

          Except as otherwise specified with respect to the Notes, any Defaulted
Interest on any Note shall forthwith cease to be payable to the registered
Holder thereof on the relevant Regular Record Date or accrual date, as the case
may be, by virtue of having been such Holder, and such Defaulted Interest may be
paid by the Company as provided for in Section 4.10(b)(ii) of the Indenture.

          13.  DENOMINATIONS; TRANSFER; EXCHANGE

          The Notes are in registered form, without coupons, in denominations of
$1,000 of Principal Amount and multiplies of $1,000. A Holder may transfer or
convert Notes in accordance with the Indenture. The Registrar may require a
Holder, among other things, to furnish appropriate endorsements and transfer
documents and to pay any taxes and fees required by law or permitted by the
Indenture. The Registrar need not transfer or exchange any Notes selected for
redemption (except, in the case of a Note to be redeemed in part, the portion of
the Note not to be redeemed) or any Notes in respect of which a Purchase Notice
or Fundamental Change Purchase Notice has been given and not withdrawn (except,
in the case of a Note to be purchased in part, the portion of the Note not to be
purchased) or any Notes for a period of 15 days before any selection of Notes to
be redeemed.

          14.  PERSONS DEEMED OWNERS

          The registered Holder of this Note may be treated as the owner of this
Note for all purposes.

          15.  UNCLAIMED MONEY OR PROPERTY

          If money for the payment of principal or interest remains unclaimed
for two years, the Trustee or Paying Agent will pay the money back to the
Company at its request.  After that, Holders entitled to the money must look to
the Company for payment unless an abandoned property law designates another
person.

          16.  AMENDMENT; SUPPLEMENT; WAIVER

          Subject to certain exceptions, the Indenture or the Notes may be
amended or supplemented with the consent of the Holders of at least a majority
in Principal Amount of the outstanding Notes and any past default or compliance
with any provision relating to the Notes may be waived in a particular instance
with the consent of the Holders of a majority in Principal Amount of the
outstanding Notes.  Without the consent of any Holder, the Com-
<PAGE>

                                     -14-

pany and the Trustee may amend or supplement the Indenture or the Notes to cure
any ambiguity, defect or inconsistency, to provide for uncertificated Notes in
addition to or in place of certificated Notes, to create a Series and establish
its terms, to remove a Guarantor which, in accordance with the terms of the
Indenture, ceases to be liable in respect of its Guarantee, or to make any other
change, provided such action does not adversely affect the rights of any
Holder.

          17.  SUCCESSOR CORPORATION

          When a successor corporation assumes all the obligations of its
predecessor under the Notes and the Indenture, the predecessor corporation will
be released from those obligations.

          18.  TRUSTEE DEALINGS WITH THE COMPANY

          American Stock Transfer & Trust Company, the Trustee under the
Indenture, in its individual or any other capacity, may make loans to, accept
deposits from, and perform services for the Company or its affiliates, and may
otherwise deal with the Company or its affiliates, as if it were not Trustee.

          19.  NO RECOURSE AGAINST OTHERS

          A director, officer, employee or stockholder, as such, of the Company
shall not have any liability for any obligations of the Company under the Notes
or the Indenture or for any claim based on, in respect of or by reason of, such
obligations or their creation.  Each Holder by accepting a Note waives and
releases all such liability. The waiver and release are part of the
consideration for the issue of the Notes.

          20.  AUTHENTICATION

          This Note shall not be valid until the Trustee signs the certificate
of authentication on the other side of this Note.

          21.  ABBREVIATIONS

          Customary abbreviations may be used in the name of a Holder or an
assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the
entireties), JT TEN (= joint tenants with right of survivorship and not as
tenants in common), CUST (= custodian), and U/G/M/A (= Uniform Gift to Minors
Act).
<PAGE>

                                     -15-

                           FORM OF CONVERSION NOTICE

To:  D.R. Horton, Inc.

          The undersigned registered holder of this Note hereby exercises the
option to convert this Note, or portion hereof (which is $1,000 Principal Amount
or a multiple thereof) designated below, for shares of Common Stock of D.R.
Horton, Inc. in accordance with the terms of the Indenture referred to in this
Note, and directs that the shares, if any, issuable and deliverable upon such
conversion, together with any check for cash deliverable upon such conversion,
and any Notes representing any unconverted principal amount hereof, be issued
and delivered to the registered holder hereof unless a different name has been
indicated below. If shares or any portion of this Note not converted are to be
issued in the name of a Person other than the undersigned, the undersigned shall
pay all transfer taxes payable with respect thereto.

          This notice shall be deemed to be an irrevocable exercise of the
option to convert this Note.

Dated:

                                             ---------------------------------

                                             ---------------------------------
                                                       Signature(s)

Fill in for registration of shares if
to be delivered, and Notes if to
be issued other than to and in the
name of registered holder:

                                             Principal Amount to be converted
                                             (if less than all):
<PAGE>

                                     -16-
--------------------------------
(Name)

                                              $__,000
--------------------------------
(Street Address)

                                              Social Security or Other
--------------------------------
(City, state and zip code)                    Taxpayer Number

Please print name and address
<PAGE>

                                     -17-

                   FORM OF FUNDAMENTAL CHANGE PURCHASE NOTICE

To:  D.R. Horton, Inc.

          The undersigned registered holder of this Note hereby acknowledges
receipt of a notice from D.R. Horton, Inc. (the "Company") as to the occurrence
of a Fundamental Change with respect to the Company and requests and instructs
the Company to purchase this Note, or the portion hereof (which is $1,000
Principal Amount or a multiple thereof) designated below, in accordance with the
terms of the Indenture referred to in this Note and directs that the check in
payment for this Note or the portion thereof (or, if the Company elects in
accordance with Section 4.03(c) of the Indenture, Common Stock) and any Notes
representing any unrepurchased principal amount hereof, be issued and delivered
to the registered holder hereof unless a different name has been indicated
below. If any portion of this Note not repurchased is to be issued in the name
of a Person other than the undersigned, the undersigned shall pay all transfer
taxes payable with respect thereto.

Dated:


                                           ------------------------------------
                                                       Signature(s)

Fill in for registration of shares if
to be delivered, and Notes if
to be issued other than to and
in the name of registered holder:


--------------------------------
(Name)


--------------------------------
(Street Address)


--------------------------------
(City, state and zip code)

Please print name and address

                              Principal Amount to be purchased (if less than
                              all): $__,000

          If the Company has elected to pay the Fundamental Change Purchase
Price, in whole or in part, in Common Stock but such portion of the Fundamental
Change Purchase
<PAGE>

                                     -18-

Price shall ultimately be payable in Cash because any of the conditions to the
payment of the Fundamental Change Purchase Price in Common Stock are not
satisfied I elect [check one]:

          __ to withdraw such Purchase Notice as to the Notes to which such
     Fundamental Change Purchase Notice relates in the Principal Amount of
     $_____,000, with certificate numbers _________, or

          __ to receive Cash in respect of the entire Fundamental Change
     Purchase Price for all Notes (or portions thereof) to which such Purchase
     Notice relates Social Note or Other Taxpayer Number.
<PAGE>

                                     -19-

                                ASSIGNMENT FORM

          If you the Holder want to assign this Note, fill in the form below:

          I or we assign and transfer this Note to


-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
              (Insert assignee's social security or tax ID number)

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
             (Print or type assignee's name, address, and zip code)
                            ----------

and irrevocably appoint


-------------------------------------------------------------------------------
agent to transfer this Note on the books of the Company.  The agent may
substitute another to act for him.


-------------------------------------------------------------------------------

Date: ________________   Your signature:_______________________________________

                         (Sign exactly as your name appears on the other side
                         of this Note)

Signature Guarantee:___________________________________________________________
                    Signature must be guaranteed by participant in a recognized
                    Signature Guarantee Medallion Program (or other signature
                    guarantor program reasonably acceptable to the Trustee)
<PAGE>

                                     -20-

              [FORM OF NOTATION ON SECURITY RELATING TO GUARANTEE]

                                   GUARANTEE

          The undersigned (the "Guarantors") have unconditionally guaranteed,
jointly and severally (such guarantee by each Guarantor being referred to herein
as the "Guarantee") (i) the due and punctual payment of the principal of and
interest on the Notes, whether at maturity, by acceleration or otherwise, the
due and punctual payment of interest on the overdue principal and interest, if
any, on the Notes, to the extent lawful, and the due and punctual performance of
all other obligations of the Company to the Holders or the Trustee all in
accordance with the terms set forth in Article Nine of the Indenture and (ii) in
case of any extension of time of payment or renewal of any Notes or any of such
other obligations, that the same will be promptly paid in full when due or
performed in accordance with the terms of the extension or renewal, whether at
stated maturity, by acceleration or otherwise.

          No past, present or future stockholder, officer, director, employee or
incorporator, as such, of any of the Guarantors shall have any liability under
the Guarantee by reason of such person's status as stockholder, officer,
director, employee or incorporator.  Each holder of a Note by accepting a Note
waives and releases all such liability.  This waiver and release are part of the
consideration for the issuance of the Guarantees.

          Each holder of a Note by accepting a Note agrees that any Guarantor
named below shall have no further liability with respect to its Guarantee if
such Guarantor otherwise ceases to be liable in respect of its Guarantee in
accordance with the terms of the Indenture.
<PAGE>

                                     -21-

          The Guarantee shall not be valid or obligatory for any purpose until
the certificate of authentication on the Notes upon which the Guarantee is noted
shall have been executed by the Trustee under the Indenture by the manual
signature of one of its authorized officers.

                              [Guarantors]

                              By: ___________________________
                                  Name:
                                  Title:
<PAGE>

                                                                       EXHIBIT B
                                                                       ---------

                          PROJECTED PAYMENT SCHEDULE*
                          --------------------------

Semi-annual Period Ending                             Projected Payment Per Note





November 11, 2003                                              $0.00
May 11, 2004                                                   $0.00
November 11, 2004                                              $0.00
May 11, 2005                                                   $0.00
November 11, 2005                                              $0.00
May 11, 2006                                                   $0.00
November 11, 2006                                              $0.00
May 11, 2007                                                   $1.75
November 11, 2007                                              $1.75
May 11, 2008                                                   $1.75
November 11, 2008                                              $1.75
May 11, 2009                                                   $1.75
November 11, 2009                                              $1.75
May 11, 2010                                                   $1.75
November 11, 2010                                              $1.75
May 11, 2011                                                   $1.75
November 11, 2011                                              $1.75
May 11, 2012                                                   $1.75
November 11, 2012                                              $1.75
May 11, 2013                                                   $1.75
November 11, 2013                                              $1.75
May 11, 2014                                                   $1.78
November 11, 2014                                              $1.87
May 11, 2015                                                   $1.97
November 11, 2015                                              $2.07
May 11, 2016                                                   $2.17
November 11, 2016                                              $2.29
May 11, 2017                                                   $2.40
November 11, 2017                                              $2.53
May 11, 2018                                                   $2.66
November 11, 2018                                              $2.79
May 11, 2019                                                   $2.94
November 11, 2019                                              $3.09
May 11, 2020                                                   $3.24
November 11, 2020                                              $3.41
May 11, 2021                                               $2,871.91

*The comparable yield means the annual yield the Company would pay, as of the
Issue Date, on a fixed-rate cash-pay nonconvertible debt security with no
contingent payments but with terms and conditions otherwise comparable to those
of the Notes.  The schedule of projected payments is determined on the basis of
the comparable yield and an assumption of linear growth of the Company's stock
price and a constant dividend yield.  The comparable yield and the schedule of
projected payments are not determined for any purpose other than for the
determination of interest accruals and adjustment thereof in respect of the
Notes for United States federal income tax purposes.  The comparable yield and
the schedule of projected payments do not constitute a projection or
representation regarding the future stock price or the amounts payable on the
Notes.