Document:

<PAGE>   1
<TABLE>
<S>     <C>
                                                                                                             EXHIBIT 4.2
                                                   webMETHODS                                        SHARES
NUMBER
WM                                               WEBMETHODS, INC.                                 COMMON STOCK
                                       INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                                                                                         SEE REVERSE FOR
                                                                                     CERTAIN DEFINITIONS AND INFORMATION
                                                                                               CONCERNING CERTAIN RIGHTS

        THIS
        CERTIFIES
        THAT

        is the owner of

                        FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $.01 EACH OF THE COMMON STOCK OF

                                                          WEBMETHODS, INC.
        ------------------------------------------------                   ----------------------------------------------
        ------------------------------------------------                   ----------------------------------------------
        ------------------------------------------------                   ----------------------------------------------
        transferable on the books of the Corporation by the holder hereof in person or by duly authorized attorney upon
        surrender of this certificate properly endorsed.

        This certificate is not valid unless countersigned and registered by the Transfer Agent and Registrar.

        WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.

        Dated:
</TABLE>
<PAGE>   2
        The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>                                 <C>                             <C>
TEN COM - as tenants in common      UNIF GIFT MIN ACT -             UNIF TRAN MIN ACT-
                                    ________ Custodian __________   _____ Custodian  ________
TEN ENT - as tenants by the           (Cust)            (Minor)     (Cust)           (Minor)
          entireties                under Uniform Gifts to Minors   under Uniform Transfers to
                                    Act _________________________   Minors Act _____________
JT TEN - as joint tenants with              (State)                                (State)
         right of survivorship
         and not as tenants in
         common
</TABLE>

    Additional abbreviations may also be used though not in the above list.

For value received, _________ hereby sell, assign and transfer unto
        Please insert social security or other
        Identifying number of assignee

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

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
   (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF
                                   ASSIGNEE)

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                                                                          shares
-------------------------------------------------------------------------
of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint

                                                                       Attorney
----------------------------------------------------------------------
to transfer the said stock on the books of the within named Corporation with
full power of substitution in the premises.

Dated
      ----------------------

                             ---------------------------------------------------
                    NOTICE:  THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND
                             WITH THE NAME AS WRITTEN UPON THE FACE OF THE
                             CERTIFICATE, IN EVERY PARTICULAR, WITHOUT
                             ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.

   SIGNATURE(S) GUARANTEED:  ---------------------------------------------------
                             THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN
                             ELIGIBLE GUARANTOR INSTITUTION (BANKS,
                             STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND
                             CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED
                             SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT TO
                             S.E.C RULE 17Ad-15.

   KEEP THIS CERTIFICATE IN A SAFE PLACE.  IF IT IS LOST, STOLEN, MUTILIATED OR
   DESTROYED, THE CORPORATION WILL REQUIRE A BOND INDEMNITY AS A CONDITION TO
   THE ISSUANCE OF A REPLACEMENT CERTIFICATE.<PAGE>   1

                                                                     EXHIBIT 4.1

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

                          AMERICAN HOMESTAR CORPORATION
                                       and
                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.,

                                 As Rights Agent
                                Rights Agreement
                          Dated as of February 10, 2000

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

<PAGE>   2

                                TABLE OF CONTENTS

<TABLE>
<S>           <C>                                                          <C>

Section 1.    Certain Definitions............................................1

Section 2.    Appointment of Rights Agent....................................5

Section 3.    Issue of Right Certificates....................................5

Section 4.    Form of Right Certificates.....................................7

Section 5.    Countersignature and Registration..............................7

Section 6.    Transfer, Split Up, Combination and Exchange of Right
              Certificates; Mutilated, Destroyed, Lost or Stolen Right
              Certificates...................................................8

Section 7.    Exercise of Rights, Purchase Price; Expiration Date of Rights..8

Section 8.    Cancellation and Destruction of Right Certificates............10

Section 9.    Availability of Shares of Preferred Stock.....................10

Section 10.   Preferred Stock Record Date...................................11

Section 11.   Adjustment of Purchase Price, Number of Shares and Number
              of Rights.....................................................12

Section 12.   Certificate of Adjusted Purchase Price or Number of Shares....20

Section 13.   Consolidation, Merger or Sale or Transfer of Assets or
              Earnings Power................................................20

Section 14.   Fractional Rights and Fractional Shares.......................24

Section 15.   Rights of Action..............................................25

Section 16.   Agreement of Right Holders....................................26

Section 17.   Right Certificate Holder Not Deemed a Stockholder.............26

Section 18.   Concerning the Rights Agent...................................26

Section 19.   Merger or Consolidation or Change of Name of Rights Agent.....27

</TABLE>

                                       i
<PAGE>   3

<TABLE>
<S>           <C>                                                          <C>
Section 20.   Duties of Rights Agent........................................28

Section 21.   Change of Rights Agent........................................30

Section 22.   Issuance of New Right Certificates............................31

Section 23.   Redemption....................................................31

Section 24.   Exchange......................................................32

Section 25.   Notice of Certain Events......................................33

Section 26.   Notices.......................................................34

Section 27.   Supplements and Amendments....................................35

Section 28.   Successors....................................................35

Section 29.   Benefits of this Agreement....................................35

Section 30.   Severability..................................................35

Section 31.   Governing Law.................................................36

Section 32.   Counterparts..................................................36

Section 33.   Descriptive Headings..........................................36

</TABLE>

                                       ii
<PAGE>   4

                                RIGHTS AGREEMENT

         RIGHTS AGREEMENT, dated as of February 10, 2000 (the "Agreement"),
between American Homestar Corporation, a Texas corporation (the "Company"), and
ChaseMellon Shareholder Services, L.L.C., a New Jersey limited liability company
(the "Rights Agent").

         The Board of Directors of the Company has authorized and declared a
dividend of one preferred share purchase right (a "Right") for each share of
Common Stock (as hereinafter defined) of the Company outstanding as of the Close
of Business (as defined below) on February 10, 2000 (the "Record Date"). Each
Right represents the right to purchase one one-thousandth (subject to
adjustment) of a share of Preferred Stock (as hereinafter defined), upon the
terms and subject to the conditions herein set forth, and the Board of Directors
of the Company has further authorized and directed the issuance of one Right
(subject to adjustment as provided herein) with respect to each share of Common
Stock that shall become outstanding between the Record Date and the earliest of
the Distribution Date, the Redemption Date and the Final Expiration Date (as
such terms are hereinafter defined); provided, however, that Rights may be
issued with respect to shares of Common Stock that shall become outstanding
after the Distribution Date and prior to the Redemption Date and the Final
Expiration Date in accordance with Section 22.

         Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereby agree as follows:

         Section 1. Certain Definitions. For purposes of this Agreement, the
following terms have the meanings indicated:

               (a) "Acquiring Person" shall mean any Person (as such term is
         hereinafter defined) who or which shall be the Beneficial Owner (as
         such term is hereinafter defined) of 15% or more of the shares of
         Common Stock then outstanding, but shall not include an Exempt Person
         (as such term is hereinafter defined); provided, however, that
         if the Board of Directors of the Company determines in good faith that
         a Person who would otherwise be an "Acquiring Person" has
         become such inadvertently (including, without limitation, because (i)
         such Person was unaware that it Beneficially Owned a percentage of
         Common Stock that would otherwise cause such Person to be an "Acquiring
         Person" or (ii) such Person was aware of the extent of its Beneficial
         Ownership of Common Stock but had no actual knowledge of the
         consequences of such Beneficial Ownership under this Rights Agreement)
         and without any intention of changing or influencing control of the
         Company, and such Person, as promptly as practicable divested or
         divests himself or itself of Beneficial Ownership of a sufficient
         number of shares of Common Stock so that such Person would no longer be
         an Acquiring Person, then such Person shall not be deemed to be or to
         have become an "Acquiring Person" for any purposes of this
         Agreement. Notwithstanding the foregoing: (i) if a Person would be
         deemed an Acquiring Person upon the adoption of this

                                       1
<PAGE>   5

         Agreement, such Person will not be deemed an Acquiring Person for any
         purposes of this Agreement unless and until such Person acquires
         Beneficial Ownership of any additional shares of Common Stock after the
         adoption of this Agreement, and (ii) no Person shall become an
         "Acquiring Person" as the result of an acquisition of shares of Common
         Stock by the Company which, by reducing the number of shares
         outstanding, increases the proportionate number of shares Beneficially
         Owned by such Person to 15% or more of the shares of Common Stock then
         outstanding, provided, however, that if a Person shall thereafter
         become the Beneficial Owner of 15% or more of the shares of Common
         Stock then outstanding by reason of such share acquisitions by the
         Company and thereafter become the Beneficial Owner of any additional
         shares of Common Stock, then such Person shall be deemed to be an
         "Acquiring Person" unless upon becoming the Beneficial Owner of such
         additional shares of Common Stock such Person does not Beneficially Own
         15% or more of the shares of Common Stock then outstanding. The phrase
         "then outstanding", when used with reference to a Person's Beneficial
         Ownership of securities of the Company, shall mean the number of such
         securities then issued and outstanding together with the number of such
         securities not then actually issued and outstanding which such Person
         would be deemed to own beneficially hereunder.

               (b) "Affiliate" and "Associate" shall have the respective
         meanings ascribed to such terms in Rule 12b-2 of the General Rules and
         Regulations under the Securities Exchange Act of 1934, as amended (the
         "Exchange Act"), as in effect on the date of this Agreement.

               (c) A Person shall be deemed the "Beneficial Owner" of, shall be
         deemed to have "Beneficial Ownership" of and shall be deemed to
         "Beneficially Own" any securities:

                    (i) which such Person or any of such Person's Affiliates or
               Associates is deemed to beneficially own, directly or indirectly
               within the meaning of Rule 13d-3 of the General Rules and
               Regulations under the Exchange Act as in effect on the date of
               this Agreement;

                    (ii) which such Person or any of such Person's Affiliates or
               Associates has (A) the right to acquire (whether such right is
               exercisable immediately or only after the passage of time)
               pursuant to any agreement, arrangement or understanding (other
               than customary agreements with and between underwriters and
               selling group members with respect to a bona fide public offering
               of securities), or upon the exercise of conversion rights,
               exchange rights, rights, warrants or options, or otherwise;
               provided, however, that a Person shall not be deemed the
               Beneficial Owner of, or to Beneficially Own, (x) securities
               tendered pursuant to a tender or exchange offer made by or on
               behalf of such Person or any of such Person's Affiliates or
               Associates until such tendered securities are accepted for
               purchase, (y)

                                       2
<PAGE>   6

               securities which such Person has a right to acquire on the
               exercise of Rights at any time prior to the time a Person becomes
               an Acquiring Person or (z) securities issuable upon exercise of
               Rights from and after the time a Person becomes an Acquiring
               Person if such Rights were acquired by such Person or any of such
               Person's Affiliates or Associates prior to the Distribution Date
               or pursuant to Section 3(a) or Section 22 hereof ("Original
               Rights") or pursuant to Section 11(i) or Section 11(n) with
               respect to an adjustment to original Rights; or (B) the right to
               vote pursuant to any agreement, arrangement or understanding;
               provided, however, that a Person shall not be deemed the
               Beneficial Owner of, or to Beneficially Own, any security by
               reason of such agreement, arrangement or understanding if the
               agreement, arrangement or understanding to vote such security (1)
               arises solely from a revocable proxy or consent given to such
               Person in response to a public proxy or consent solicitation made
               pursuant to, and in accordance with, the applicable rules and
               regulations promulgated under the Exchange Act and (2) is not
               also then reportable on Schedule 13D under the Exchange Act (or
               any comparable or successor report); or

                    (iii) which are Beneficially Owned, directly or indirectly,
               by any other Person with which such Person or any of such
               Person's Affiliates or Associates has any agreement, arrangement
               or understanding (other than customary agreements with and
               between underwriters and selling group members with respect to a
               bona fide public offering of securities) for the purpose of
               acquiring, holding, voting (except to the extent contemplated by
               the proviso to Section 1(c)(ii)(B)) or disposing of any
               securities of the Company.

               (d) "Business Day" shall mean any day other than a Saturday, a
         Sunday, or a day on which banking or trust institutions in the State of
         New York, or the State in which the principal office of the Rights
         Agent is located, are authorized or obligated by law or executive order
         to close.

               (e) "Close of Business" on any given date shall mean 5:00 P.M.,
         Eastern Standard time, on such date; provided, however, that if such
         date is not a Business Day it shall mean 5:00 P.M., Eastern Standard
         time, on the next succeeding Business Day.

               (f) "Common Stock" when used with reference to the Company shall
         mean the common stock, presently par value $.05 per share, of the
         Company. "Common Stock" when used with reference to any Person other
         than the Company shall mean the capital stock (or, in the case of an
         unincorporated entity, the equivalent equity interest) with the
         greatest voting power of such other Person or, the equity securities or
         other equity interest having power to control or direct the management,
         of such other Person.

               (g) "Distribution Date" shall have the meaning set forth in
         Section 3 hereof.

                                       3
<PAGE>   7

               (h) "Exempt Person" shall mean (i) the Company, (ii) any
         Subsidiary (as such term is hereinafter defined) of the Company, (iii)
         any employee benefit plan of the Company or of any Subsidiary of the
         Company, (iv) any entity or trustee holding Common Stock for or
         pursuant to the terms of any such plan or for the purpose of funding
         any such plan or funding other employee benefits for employees of the
         Company or of any Subsidiary of the Company; (v) Laurence A. Dawson,
         Jr., Sandra K. Dawson, and their respective Affiliates (including
         without limitation Dawson Adventures, Ltd., a Texas limited
         partnership), Associates, Family Members and trusts established for the
         benefit of themselves or their respective Family Members; (vi) Finis F.
         Teeter, his Affiliates, Associates (including without limitation Teeter
         Investments, Ltd., a Texas limited partnership), Family Members and
         trusts established for the benefit of himself or his Family Members.

               (i) "Family Member" shall mean, as to any individual, any other
         individual having a relationship by blood (to the third degree of
         consanguinity), marriage, or adoption to such individual."

               (j) "Final Expiration Date" shall have the meaning set forth in
         Section 7 hereof.

               (k) "NASDAQ Stock Market" shall mean the stock market operated by
         the National Association of Securities Dealers, Inc.

               (l) "Person" shall mean any individual, firm, corporation,
         limited liability company, partnership, joint venture, association,
         trust, unincorporated organization or other entity, and shall include
         any successor (by merger or otherwise) of such entity.

               (m) "Preferred Stock" shall mean the Series B Junior
         Participating Preferred Stock, par value $1.00 per share, of the
         Company having the rights and preferences set forth in the Form of
         Certificate of Designations attached to this Agreement as Exhibit A.

               (n) "Redemption Date" shall have the meaning set forth in Section
         7 hereof.

               (o) "Securities Act" shall mean the Securities Act of 1933, as
         amended.

               (p) "Stock Acquisition Date" shall mean the first date of public
         announcement (which for purposes of this definition, shall include,
         without limitation, a report filed pursuant to Section 13(d) of the
         Exchange Act) by the Company or an Acquiring Person that an Acquiring
         Person has become such or such earlier date as a majority of the
         Company's Board of Directors shall become aware of the existence of an
         Acquiring Person.

               (q) "Subsidiary" of any Person shall mean any corporation or
         other entity of which securities or other ownership interests having
         ordinary voting power sufficient to elect

                                       4
<PAGE>   8

         a majority of the board of directors or other persons performing
         similar functions are Beneficially Owned, directly or indirectly, by
         such Person, and any corporation or other entity that is otherwise
         controlled by such Person.

         Section 2. Appointment of Rights Agent. The Company hereby appoints the
Rights Agent to act as agent for the Company in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment. The
Company may from time to time appoint such co-Rights Agents as it may deem
necessary or desirable. The Rights Agent shall have no duty to supervise and in
no event shall be liable for the acts or omissions of any such co-Rights Agent.

         Section 3. Issue of Right Certificates. (a) Until the earlier of (i)
the tenth day after the Stock Acquisition Date or (ii) the tenth business day
(or such later date as may be determined by action of the Board of Directors
prior to such time as any Person becomes an Acquiring Person) after the date of
the commencement by any Person (other than an Exempt Person) of, or of the first
public announcement of the intention of such Person (other than an Exempt
Person) to commence, a tender or exchange offer the consummation of which would
result in any Person becoming the Beneficial Owner of shares of Common Stock
aggregating 15% or more of the Common Stock then outstanding (including any such
date which is after the date of this Agreement and prior to the issuance of the
Rights; the earlier of such dates being herein referred to as the "Distribution
Date"), (x) the Rights will be evidenced (subject to the provisions of Section
3(b) hereof) by the certificates for Common Stock registered in the names of the
holders thereof and not by separate Right Certificates, and (y) the Rights will
be transferable only in connection with the transfer of Common Stock. As soon as
practicable after the Distribution Date, the Company shall promptly notify the
Rights Agent thereof (and, in the event the Rights Agent is not also the
transfer agent for the Company's Common Stock, provide the Rights Agent with a
shareholders list of Common Stock) and the Company will prepare and execute, the
Rights Agent will countersign, and the Company will send or cause to be sent
(and the Rights Agent will, if requested, send) by first-class, insured,
postage-prepaid mail, to each record holder of Common Stock as of the Close of
Business on the Distribution Date (other than any Acquiring Person or any
Associate or Affiliate of an Acquiring Person), at the address of such holder
shown on the records of the Company, a Right Certificate, in substantially the
form of Exhibit B hereto (a "Right Certificate"), evidencing one Right (subject
to adjustment as provided herein) for each share of Common Stock so held, with
respect to the holders of Common Stock. As of the Distribution Date, the Rights
will be evidenced solely by such Right Certificates.

         (b) On the Record Date, or as soon as practicable thereafter, the
Company will send a copy of a Summary of Rights to Purchase Shares of Preferred
Stock, in substantially the form of Exhibit C hereto (the "Summary of Rights"),
by first-class, postage-prepaid mail, to each record holder of Common Stock as
of the close of business on the Record Date (other than any Acquiring Person or
any Associate or Affiliate of any Acquiring Person), at the address of such
holder shown on the records of the Company. With respect to all certificates for
Common Stock outstanding as of the Record Date and until the Distribution Date,
the Rights will be evidenced by such certificates

                                       5
<PAGE>   9

registered in the names of the holders thereof together with the Summary of
Rights. Until the Distribution Date (or the earlier of the Redemption Date or
the Final Expiration Date), the surrender for transfer of any certificate for
Common Stock outstanding on the Record Date, with or without a copy of the
Summary of Rights, shall also constitute the transfer of the Rights associated
with the Common Stock represented thereby.

         (c) Certificates issued for Common Stock (including, without
limitation, upon transfer of outstanding Common Stock, disposition of Common
Stock out of treasury stock or issuance or reissuance of Common Stock out of
authorized but unissued shares) after the Record Date but prior to the earliest
of the Distribution Date, the Redemption Date or the Final Expiration Date shall
have impressed on, printed on, written on or otherwise affixed to them the
following legend:

              This certificate also evidences and entitles the holder hereof to
              certain Rights as set forth in a Rights Agreement between American
              Homestar Corporation and ChaseMellon Shareholder Services, L.L.C.,
              dated as of February 10, 2000, as the same may be amended from
              time to time (the "Rights Agreement"), the terms of which are
              hereby incorporated herein by reference and a copy of which is on
              file at the principal executive offices of American Homestar
              Corporation. Under certain circumstances, as set forth in the
              Rights Agreement, such Rights will be evidenced by separate
              certificates and will no longer be evidenced by this certificate.
              American Homestar Corporation will mail to the holder of this
              certificate a copy of the Rights Agreement without charge after
              receipt of a written request therefor. Under certain
              circumstances, as set forth in the Rights Agreement, Rights owned
              by or transferred to any Person who is, was or becomes an
              Acquiring Person (as defined in the Rights Agreement) and certain
              transferees thereof whether then held by or on behalf of such
              Person or by any subsequent holder will become null and void and
              will no longer be transferable.

With respect to such certificates containing the foregoing legend, until the
Distribution Date the Rights associated with the Common Stock represented by
such certificates shall be evidenced by such certificates alone, and the
surrender for transfer of any such certificate, except as otherwise provided
herein, shall also constitute the transfer of the Rights associated with the
Common Stock represented thereby. In the event that the Company purchases or
otherwise acquires any Common Stock after the Record Date but prior to the
Distribution Date, any Rights associated with such Common Stock shall be deemed
canceled and retired so that the Company shall not be entitled to exercise any
Rights associated with the Common Stock which are no longer outstanding.

                                       6
<PAGE>   10

         Notwithstanding this paragraph (c), the omission of a legend shall not
affect the enforceability of any part of this Agreement or the rights of any
holder of the Rights.

         Section 4. Form of Right Certificates. The Right Certificates (and the
forms of election to purchase shares and of assignment to be printed on the
reverse thereof) shall be substantially in the form set forth in Exhibit B
hereto and may have such marks of identification or designation and such
legends, summaries or endorsements printed thereon as the Company may deem
appropriate, and as are not inconsistent with the provisions of this Agreement
and which do not affect the rights, duties or responsibilities of the Rights
Agent, or as may be required to comply with any applicable law or with any rule
or regulation made pursuant thereto or with any rule or regulation of NASDAQ or
of any other automated quotation system or stock exchange on which the Rights
may from time to time be listed, or to conform to usage. Subject to the
provisions of Sections 11, 13 and 22 hereof, the Right Certificates shall
entitle the holders thereof to purchase such number of one one-thousandths of a
share of Preferred Stock as shall be set forth therein at the price per one
one-thousandth of a share of Preferred Stock set forth therein (the "Purchase
Price"), but the number of such one one-thousandths of a share of Preferred
Stock and the Purchase Price shall be subject to adjustment as provided herein.

         Section 5. Countersignature and Registration. (a) The Right
Certificates shall be executed on behalf of the Company by the Chairman of the
Board of Directors, the President, any of the Vice Presidents, the Treasurer or
the Controller of the Company, either manually or by facsimile signature, shall
have affixed thereto the Company's seal or a facsimile thereof, and shall be
attested by the Secretary or an Assistant Secretary of the Company, either
manually or by facsimile signature. The Right Certificates shall be manually
countersigned by the Rights Agent and shall not be valid for any purpose unless
countersigned. In case any officer of the Company who shall have signed any of
the Right Certificates shall cease to be such officer of the Company before
countersignature by the Rights Agent and issuance and delivery by the Company,
such Right Certificates, nevertheless, may be countersigned by the Rights Agent
and issued and delivered by the Company with the same force and effect as though
the Person who signed such Right Certificates had not ceased to be such officer
of the Company; and any Right Certificate may be signed on behalf of the Company
by any Person who, at the actual date of the execution of such Right
Certificate, shall be a proper officer of the Company to sign such Right
Certificate, although at the date of the execution of this Agreement any such
Person was not such an officer.

         (b) Following the Distribution Date and receipt by the Rights Agent of
the notice and, if applicable, list of record holders of Rights referred to in
Section 3(a), the Rights Agent will keep or cause to be kept, at an office or
agency designated pursuant to Section 26 hereof, for such purpose, books for
registration and transfer of the Right Certificates issued hereunder. Such books
shall show the names and addresses of the respective holders of the Right
Certificates, the number of Rights evidenced on its face by each of the Right
Certificates and the date of each of the Right Certificates.

                                       7
<PAGE>   11

         Section 6. Transfer, Split Up, Combination and Exchange of Right
Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificates. (a)
Subject to the provisions of Sections 7(e), 11(a)(ii) and 14 hereof, at any time
after the close of business on the Distribution Date, and prior to the close of
business on the earlier of the Redemption Date or the Final Expiration Date, any
Right Certificate or Right Certificates may be transferred, split up, combined
or exchanged for another Right Certificate or Right Certificates, entitling the
registered holder to purchase a like number of one one-thousandths of a share of
Preferred Stock as the Right Certificate or Right Certificates surrendered then
entitled such holder to purchase. Any registered holder desiring to transfer,
split up, combine or exchange any Right Certificate or Right Certificates shall
make such request in writing delivered to the Rights Agent, and shall surrender
the Right Certificate or Right Certificates to be transferred, split up,
combined or exchanged at the office or agency of the Rights Agent designated
pursuant to Section 26 hereof for such purpose. Thereupon the Rights Agent shall
countersign and deliver to the Person entitled thereto a Right Certificate or
Right Certificates, as the case may be, as so requested. The Company may require
payment of a sum sufficient to cover any tax or governmental charge that may be
imposed in connection with any transfer, split up, combination or exchange of
Right Certificates. The Rights Agent shall have no duty or obligation under this
Section 6 unless and until it is satisfied that all such taxes and/or
governmental charges required to be paid under this Section (or under any other
provision of this Agreement that requires the payment of taxes or governmental
charges) have been paid in full.

         (b) Subject to the provisions of Section 11(a)(ii) hereof, at any time
after the Distribution Date and prior to the close of business on the earlier of
the Redemption Date or the Final Expiration Date, upon receipt by the Company
and the Rights Agent of evidence satisfactory to them of the loss, theft,
destruction or mutilation of a Right Certificate, and, in case of loss, theft or
destruction, of indemnity or security satisfactory to them, and, at the
Company's request, reimbursement to the Company and the Rights Agent of all
reasonable expenses incidental thereto, and upon surrender to the Rights Agent
and cancellation of the Right Certificate if mutilated, the Company will make
and deliver a new Right Certificate of like tenor to the Rights Agent for
delivery to the registered holder in lieu of the Right Certificate so lost,
stolen, destroyed or mutilated.

         Section 7. Exercise of Rights, Purchase Price; Expiration Date of
Rights. (a) Except as otherwise provided herein, the Rights shall become
exercisable on the Distribution Date, and thereafter the registered holder of
any Right Certificate may, subject to Section 11(a)(ii) hereof and except as
otherwise provided herein, exercise the Rights evidenced thereby in whole or in
part upon surrender of the Right Certificate, with the form of election to
purchase on the reverse side thereof duly executed, to the Rights Agent at the
office or agency of the Rights Agent designated pursuant to Section 26 hereof
for such purpose, together with payment of the Purchase Price for each one
one-thousandth of a share of Preferred Stock as to which the Rights are
exercised, at any time which is both after the Distribution Date and prior to
the earliest of (i) the Close of Business on February 9, 2010 (the "Final
Expiration Date"), (ii) the time at which the Rights are redeemed as provided in

                                       8
<PAGE>   12

Section 23 hereof (the "Redemption Date") or (iii) the time at which such Rights
are exchanged as provided in Section 24 hereof.

         (b) The Purchase Price shall be initially $30.00 for each one
one-thousandth of a share of Preferred Stock purchasable upon the exercise of a
Right. The Purchase Price and the number of one one-thousandths of a share of
Preferred Stock or other securities or property to be acquired upon exercise of
a Right shall be subject to adjustment from time to time as provided in Sections
11 and 13 hereof and shall be payable in lawful money of the United States of
America in accordance with paragraph (c) of this Section 7.

         (c) Except as otherwise provided herein, upon receipt of a Right
Certificate representing exercisable Rights, with the form of election to
purchase duly executed, accompanied by payment of the aggregate Purchase Price
for the shares of Preferred Stock to be purchased and an amount equal to any
applicable tax or governmental charge required to be paid by the holder of such
Right Certificate in accordance with Section 9 hereof, in cash or by certified
check, cashier's check or money order payable to the order of the Company, the
Rights Agent shall thereupon promptly (i) (A) requisition from any transfer
agent of the Preferred Stock certificates for the number of shares of Preferred
Stock to be purchased and the Company hereby irrevocably authorizes its transfer
agent to comply with all such requests, or (B) requisition from the depositary
agent depositary receipts representing interests in such number of one
one-thousandths of a share of Preferred Stock as are to be purchased (in which
case certificates for the Preferred Stock represented by such receipts shall be
deposited by the transfer agent with the depositary agent) and the Company
hereby directs the depositary agent to comply with such request, (ii) when
necessary to comply with this Agreement, requisition from the Company the amount
of cash to be paid in lieu of issuance of fractional shares in accordance with
Section 14 hereof, (iii) promptly after receipt of such certificates or
depositary receipts, cause the same to be delivered to or upon the order of the
registered holder of such Right Certificate, registered in such name or names as
may be designated by such holder and (iv) when necessary to comply with this
Agreement, after receipt, promptly deliver such cash to or upon the order of the
registered holder of such Right Certificate.

         (d) Except as otherwise provided herein, in case the registered holder
of any Right Certificate shall exercise less than all the Rights evidenced
thereby, a new Right Certificate evidencing Rights equivalent to the exercisable
Rights remaining unexercised shall be issued by the Rights Agent to the
registered holder of such Right Certificate or to his or her duly authorized
assigns, subject to the provisions of Sections 6 and 14 hereof.

         (e) Notwithstanding anything in this Agreement to the contrary, neither
the Rights Agent nor the Company shall be obligated to undertake any action with
respect to a registered holder of Rights upon the occurrence of any purported
transfer or exercise of Rights pursuant to Section 6 hereof or this Section 7
unless such registered holder shall have (i) properly completed and signed the
certificate contained in the form of assignment or election to purchase set
forth on the reverse

                                       9
<PAGE>   13

side of the Rights Certificate surrendered for such transfer or exercise and
(ii) provided such additional evidence of the identity of the Beneficial Owner
(or former Beneficial Owner) thereof as the Company or the Rights Agent shall
reasonably request.

         Section 8. Cancellation and Destruction of Right Certificates. All
Right Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Company or to any of its
agents, be delivered to the Rights Agent for cancellation or in canceled form,
or, if surrendered to the Rights Agent, shall be canceled by it, and no Right
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the provisions of this Agreement. The Company shall deliver to the Rights
Agent for cancellation and retirement, and the Rights Agent shall so cancel and
retire, any other Right Certificate purchased or acquired by the Company
otherwise than upon the exercise thereof. The Rights Agent shall deliver all
canceled Right Certificates to the Company, or shall, at the written request of
the Company, destroy such canceled Right Certificates, and in such case shall
deliver a certificate of destruction thereof to the Company.

         Section 9. Availability of Shares of Preferred Stock.

         (a) The Company covenants and agrees that it will cause to be reserved
and kept available out of its authorized and unissued shares of Preferred Stock
or any shares of Preferred Stock held in its treasury, the number of shares of
Preferred Stock that will be sufficient to permit the exercise in full of all
outstanding Rights.

         (b) So long as the shares of Preferred Stock (and, following the time
that a Person becomes an Acquiring Person, shares of Common Stock and other
securities) issuable upon the exercise of Rights may be listed or admitted to
trading on the NASDAQ Stock Market or listed on any other stock exchange or
quotation system, the Company shall use its best efforts to cause, from and
after such time as the Rights become exercisable, all shares reserved for such
issuance to be listed or admitted to trading on the NASDAQ Stock Market or
listed on any other exchange or national quotation system upon official notice
of issuance upon such exercise.

         (c) From and after such time as the Rights become exercisable, the
Company shall use its best efforts, if then necessary to permit the issuance of
shares of Preferred Stock (and following the time that a Person first becomes an
Acquiring Person, shares of Common Stock and other securities) upon the exercise
of Rights, to register and qualify such shares of Preferred Stock (and,
following the time that a Person first becomes an Acquiring Person, shares of
Common Stock and other securities) under the Securities Act and any applicable
state securities or "Blue Sky" laws (to the extent exemptions therefrom are not
available), cause such registration statement and qualifications to become
effective as soon as possible after such filing and keep such registration and
qualifications effective until the earlier of the date as of which the Rights
are no longer exercisable for such securities and the Final Expiration Date. The
Company may temporarily suspend, for a period of time not to exceed 90 days, the
exercisability of the Rights in order to prepare and file a

                                       10
<PAGE>   14

registration statement under the Securities Act and permit it to become
effective. Upon any such suspension, the Company shall promptly notify the
Rights Agent thereof and shall issue a public announcement stating that the
exercisability of the Rights has been temporarily suspended, as well as a public
announcement (with prompt notice thereof to the Rights Agent) at such time as
the suspension is no longer in effect. In addition, if the Company shall
determine that a registration statement is required following the Distribution
Date, the Company may, by issuing a public announcement, temporarily suspend the
right to exercise the Rights until such time as a registration statement has
been declared effective. The Company shall notify the Rights Agent whenever it
makes a public announcement pursuant to this Section 9(c) and provide the Rights
Agent with a copy of such announcement. Notwithstanding any provision of this
Agreement to the contrary, the Rights shall not be exercisable in any
jurisdiction unless the requisite qualification in such jurisdiction shall have
been obtained and until a registration statement under the Securities Act (if
required) shall have been declared effective.

         (d) The Company covenants and agrees that it will take all such action
as may be necessary to ensure that all shares of Preferred Stock (and, following
the time that a Person becomes an Acquiring Person, shares of Common Stock and
other securities) delivered upon exercise of Rights shall, at the time of
delivery of the certificates therefor (subject to payment of the Purchase
Price), be duly and validly authorized and issued and fully paid and
nonassessable shares.

         (e) The Company further covenants and agrees that it will pay when due
and payable any and all taxes and governmental charges (excluding income taxes)
which may be payable solely in respect of the issuance or delivery of the Right
Certificates or of any shares of Preferred Stock (or shares of Common Stock or
other securities) upon the exercise of Rights. The Company shall not, however,
be required to pay any such tax or governmental charge which may be payable in
respect of any transfer or delivery of Right Certificates to a Person other
than, or the issuance or delivery of certificates or depositary receipts for the
Preferred Stock (or shares of Common Stock or other securities) in a name other
than that of, the registered holder of the Right Certificate evidencing Rights
surrendered for exercise or to issue or deliver any certificates or depositary
receipts for Preferred Stock (or shares of Common Stock or other securities)
upon the exercise of any Rights until any such tax or governmental charge shall
have been paid (any such tax or governmental charge being payable by that holder
of such Right Certificate at the time of surrender) or until it has been
established to the Company's reasonable satisfaction that no such tax or
governmental charge is due.

         Section 10. Preferred Stock Record Date. Each Person in whose name a
certificate for Preferred Stock is issued upon the exercise of Rights shall for
all purposes be deemed to have become the holder of record of the shares of
Preferred Stock represented thereby on, and such certificate shall be dated the
date upon which the Right Certificate evidencing such Rights was duly
surrendered and payment of the Purchase Price (and any applicable taxes or
governmental charges) was made; provided, however, that if the date of such
surrender and payment is a date upon which the Preferred Stock transfer books of
the Company are closed, such Person shall be deemed to have

                                       11
<PAGE>   15

become the record holder of such shares on, and such certificate shall be dated,
the next succeeding Business Day on which the Preferred Stock transfer books of
the Company are open. Prior to the exercise of the Rights evidenced thereby, the
holder of a Right Certificate shall not be entitled to any rights of a holder of
Preferred Stock for which the Rights shall be exercisable, including, without
limitation, the right to vote or to receive dividends or other distributions,
and shall not be entitled to receive any notice of any proceedings of the
Company, except as provided herein.

         Section 11. Adjustment of Purchase Price, Number of Shares and Number
of Rights. The Purchase Price, the number of shares of Preferred Stock or other
securities or property purchasable upon exercise of each Right and the number of
Rights outstanding are subject to adjustment from time to time as provided in
this Section 11.

               (a) (i) In the event the Company shall at any time after the date
         of this Agreement (A) declare a dividend on the Preferred Stock payable
         in shares of Preferred Stock, (B) subdivide the outstanding Preferred
         Stock, (C) combine the outstanding Preferred Stock into a smaller
         number of Preferred Stock or (D) issue any shares of its capital stock
         in a reclassification of the Preferred Stock (including any such
         reclassification in connection with a consolidation or merger in which
         the Company is the continuing or surviving corporation), except as
         otherwise provided in this Section 11(a), the Purchase Price in effect
         at the time of the record date for such dividend or of the effective
         date of such subdivision, combination or reclassification, and the
         number and kind of shares of capital stock issuable on such date, shall
         be proportionately adjusted so that the holder of any Right exercised
         after such time shall be entitled to receive the aggregate number and
         kind of shares of capital stock which, if such Right had been exercised
         immediately prior to such date and at a time when the Preferred Stock
         transfer books of the Company were open, the holder would have owned
         upon such exercise and been entitled to receive by virtue of such
         dividend, subdivision, combination or reclassification; provided,
         however, that in no event shall the consideration to be paid upon the
         exercise of one Right be less than the aggregate par value of the
         shares of capital stock of the Company issuable upon exercise of one
         Right.

                   (ii) Subject to Section 24 of this Agreement and except as
         otherwise provided in this Section 11(a)(ii), in the event any Person
         becomes an Acquiring Person, each holder of a Right shall thereafter
         have the right to receive, upon exercise thereof at a price equal to
         the then current Purchase Price multiplied by the number of one
         one-thousandths of a share of Preferred Stock for which a Right is then
         exercisable, in accordance with the terms of this Agreement and in lieu
         of shares of Preferred Stock, such number of shares of Common Stock (or
         at the option of the Company, such number of one one-thousandths of
         shares of Preferred Stock) as shall equal the result obtained by (x)
         multiplying the then current Purchase Price by the number of one
         one-thousandths of a share of Preferred Stock for which a Right is then
         exercisable and dividing that product by (y) 50% of the then current
         per share market price of the Company's Common Stock (determined
         pursuant to Section

                                       12
<PAGE>   16

         11(d) hereof) on the date of the occurrence of such event; provided,
         however, that the Purchase Price and the number of shares of Common
         Stock so receivable upon exercise of a Right shall thereafter be
         subject to further adjustment as appropriate in accordance with Section
         11(f) hereof. Notwithstanding anything in this Agreement to the
         contrary, however, from and after the time (the "invalidation time")
         when any Person first becomes an Acquiring Person, any Rights that are
         Beneficially Owned by (x) any Acquiring Person (or any Affiliate or
         Associate of any Acquiring Person), (y) a transferee of any Acquiring
         Person (or any such Affiliate or Associate) who becomes a transferee
         after the invalidation time or (z) a transferee of any Acquiring Person
         (or any such Affiliate or Associate) who became a transferee prior to
         or concurrently with the invalidation time pursuant to either (I) a
         transfer from the Acquiring Person to holders of its equity securities
         or to any Person with whom it has any continuing agreement, arrangement
         or understanding regarding the transferred Rights or (II) a transfer
         which the Company's Board of Directors has determined is part of an
         agreement, arrangement or understanding which has the purpose or effect
         of avoiding the provisions of this paragraph, and subsequent
         transferees of such Persons, shall be null and void without any further
         action and any holder of such Rights shall thereafter have no rights
         whatsoever with respect to such Rights under any provision of this
         Agreement. The Company shall notify the Rights Agent when this Section
         11(a)(ii) applies and shall use all reasonable efforts to ensure that
         the provisions of this Section 11(a)(ii) are complied with, but neither
         the Company nor the Rights Agent shall have any liability to any holder
         of Right Certificates or other Person as a result of its failure to
         make any determinations with respect to an Acquiring Person or its
         Affiliates, Associates or transferees hereunder. From and after the
         invalidation time, no Right Certificate shall be issued pursuant to
         Section 3 or Section 6 hereof that represents Rights that are or have
         become null and void pursuant to the provisions of this paragraph, and
         any Right Certificate delivered to the Rights Agent that represents
         Rights, that are or have become null and void pursuant to the
         provisions of this paragraph shall be canceled. From and after the
         occurrence of an event specified in Section 13(a) hereof, any Rights
         that theretofore have not been exercised pursuant to this Section
         11(a)(ii) shall thereafter be exercisable only in accordance with
         Section 13 and not pursuant to this Section 11(a)(ii).

                   (iii) The Company may at its option substitute for a share of
         Common Stock issuable upon the exercise of Rights in accordance with
         the foregoing subparagraph (ii) such number or fractions of shares of
         Preferred Stock having an aggregate current market value equal to the
         current per share market price of a share of Common Stock. In the event
         that there shall not be sufficient shares of Common Stock issued but
         not outstanding or authorized but unissued to permit the exercise in
         full of the Rights in accordance with the foregoing subparagraph (ii),
         the Company's Board of Directors shall, to the extent permitted by
         applicable law and any material agreements then in effect to which the
         Company is a party (A) determine the excess of (1) the value of the
         shares of Common Stock issuable upon the exercise of a Right in
         accordance with the foregoing subparagraph (ii) (the "Current Value")

                                       13
<PAGE>   17

         over (2) the then current Purchase Price multiplied by the number of
         one one-thousandths of shares of Preferred Stock for which a Right was
         exercisable immediately prior to the time that the Acquiring Person
         became such (such excess, the "Spread"), and (B) with respect to each
         Right (other than Rights which have become void pursuant to Section
         11(a)(ii)), make adequate provision to substitute for the shares of
         Common Stock issuable in accordance with subparagraph (ii) upon
         exercise of the Right and payment of the applicable Purchase Price, (1)
         cash, (2) a reduction in the Purchase Price, (3) shares of Preferred
         Stock or other equity securities of the Company (including, without
         limitation, shares or fractions of shares of preferred stock which, by
         virtue of having dividend, voting and liquidation rights substantially
         comparable to those of the shares of Common Stock, are deemed in good
         faith by the Company's Board of Directors to have substantially the
         same value as the shares of Common Stock (such shares of Preferred
         Stock and shares or fractions of shares of preferred stock are
         hereinafter referred to as "Common Stock Equivalents")), (4) debt
         securities of the Company, (5) other assets, or (6) any combination of
         the foregoing, having a value which, when added to the value of the
         shares of Common Stock actually issued upon exercise of such Right,
         shall have an aggregate value equal to the Current Value (less the
         amount of any reduction in the Purchase Price), where such aggregate
         value has been determined by the Company's Board of Directors upon the
         advice of a nationally recognized investment banking firm selected in
         good faith by the Company's Board of Directors; provided, however, if
         the Company shall not make adequate provision to deliver value pursuant
         to clause (B) above within thirty (30) days following the date that the
         Acquiring Person became such (the "Section 11(a)(ii) Trigger Date"),
         then the Company shall be obligated to deliver, to the extent permitted
         by applicable law and any material agreements then in effect to which
         the Company is a party, upon the surrender for exercise of a Right and
         without requiring payment of the Purchase Price, shares of Common Stock
         (to the extent available), and then, if necessary, such number or
         fractions of shares of Preferred Stock (to the extent available) and
         then, if necessary, cash, which shares and/or cash have an aggregate
         value equal to the Spread. If, upon the date any Person becomes an
         Acquiring Person, the Company's Board of Directors shall determine in
         good faith that it is likely that sufficient additional shares of
         Common Stock could be authorized for issuance upon exercise in full of
         the Rights, then, if the Company's Board of Directors so elects, the
         thirty (30) day period set forth above may be extended to the extent
         necessary, but not more than ninety (90) days after the Section
         11(a)(ii) Trigger Date, in order that the Company may seek stockholder
         approval for the authorization of such additional shares (such thirty
         (30) day period, as it may be extended, is herein called the
         "Substitution Period"). To the extent that the Company determines that
         some action need be taken pursuant to the second and/or third sentence
         of this Section 11(a)(iii), the Company (x) shall provide, subject to
         Section 11(a)(ii) hereof and the last sentence of this Section
         11(a)(iii) hereof, that such action shall apply uniformly to all
         outstanding Rights and (y) may suspend the exercisability of the Rights
         until the expiration of the Substitution Period in order to seek any
         authorization of additional shares and/or to decide the appropriate
         form of distribution to be made pursuant to such second sentence and

                                       14
<PAGE>   18

         to determine the value thereof. In the event of any such suspension,
         the Company shall promptly notify the Rights Agent thereof and issue a
         public announcement stating that the exercisability of the Rights has
         been temporarily suspended, as well as a public announcement (with
         prompt notice thereof to the Rights Agent) at such time as the
         suspension is no longer in effect. For purposes of this Section
         11(a)(iii), the value of the shares of Common Stock shall be the
         current per share market price (as determined pursuant to Section
         11(d)(i)) on the Section 11(a)(ii) Trigger Date and the per share or
         fractional value of any "Common Stock equivalent" shall be deemed to
         equal the current per share market price of the Common Stock. The Board
         of Directors of the Company may, but shall not be required to,
         establish procedures to allocate the right to receive shares of Common
         Stock upon the exercise of the Rights among holders of Rights pursuant
         to this Section 11(a)(iii).

                   (b) In case the Company shall fix a record date for the
         issuance of rights, options or warrants to all holders of Preferred
         Stock entitling them (for a period expiring within 45 calendar days
         after such record date) to subscribe for or purchase Preferred Stock
         (or shares having the same rights, privileges and preferences as the
         Preferred Stock ("equivalent preferred shares")) or securities
         convertible into Preferred Stock or equivalent preferred shares at a
         price per share of Preferred Stock or equivalent preferred shares (or
         having a conversion price per share, if a security convertible into
         shares of Preferred Stock or equivalent preferred shares) less than the
         then current per share market price of the Preferred Stock (determined
         pursuant to Section 11(d) hereof) on such record date, the Purchase
         Price to be in effect after such record date shall be determined by
         multiplying the Purchase Price in effect immediately prior to such
         record date by a fraction, the numerator of which shall be the number
         of shares of Preferred Stock and equivalent preferred shares
         outstanding on such record date plus the number of shares of Preferred
         Stock and equivalent preferred shares which the aggregate offering
         price of the total number of shares of Preferred Stock and/or
         equivalent preferred shares so to be offered (and/or the aggregate
         initial conversion price of the convertible securities so to be
         offered) would purchase at such current market price, and the
         denominator of which shall be the number of shares of Preferred Stock
         and equivalent preferred shares outstanding on such record date plus
         the number of additional shares of Preferred Stock and/or equivalent
         preferred shares to be offered for subscription or purchase (or into
         which the convertible securities so to be offered are initially
         convertible); provided, however, that in no event shall the
         consideration to be paid upon the exercise of one Right be less than
         the aggregate par value of the shares of capital stock of the Company
         issuable upon exercise of one Right. In case such subscription price
         may be paid in a consideration part or all of which shall be in a form
         other than cash, the value of such consideration shall be as determined
         in good faith by the Board of Directors of the Company, whose
         determination shall be described in a statement filed with the Rights
         Agent. Shares of Preferred Stock and equivalent preferred shares owned
         by or held for the account of the Company shall not be deemed
         outstanding for the purpose of any such computation. Such adjustment
         shall be made successively whenever such a record date is fixed; and in
         the event

                                       15
<PAGE>   19

         that such rights, options or warrants are not so issued, the Purchase
         Price shall be adjusted to be the Purchase Price which would then be in
         effect if such record date had not been fixed.

                   (c) In case the Company shall fix a record date for the
         making of a distribution to all holders of the Preferred Stock
         (including any such distribution made in connection with a
         consolidation or merger in which the Company is the continuing or
         surviving corporation) of evidences of indebtedness or assets (other
         than a regular quarterly cash dividend or a dividend payable in
         Preferred Stock) or subscription rights or warrants (excluding those
         referred to in Section 11(b) hereof), the Purchase Price to be in
         effect after such record date shall be determined by multiplying the
         Purchase Price in effect immediately prior to such record date by a
         fraction, the numerator of which shall be the then current per share
         market price of the Preferred Stock (determined pursuant to Section
         11(d) hereof) on such record date, less the fair market value (as
         determined in good faith by the Board of Directors of the Company whose
         determination shall be described in a statement filed with the Rights
         Agent) of the portion of the assets or evidences of indebtedness so to
         be distributed or of such subscription rights or warrants applicable to
         one share of Preferred Stock, and the denominator of which shall be
         such current per share market price (determined pursuant to Section
         11(d) hereof) of the Preferred Stock; provided, however, that in no
         event shall the consideration to be paid upon the exercise of one Right
         be less than the aggregate par value of the shares of capital stock of
         the Company to be issued upon exercise of one Right. Such adjustments
         shall be made successively whenever such a record date is fixed; and in
         the event that such distribution is not so made, the Purchase Price
         shall again be adjusted to be the Purchase Price which would then be in
         effect if such record date had not been fixed.

                   (d) (i) Except as otherwise provided herein, for the purpose
         of any computation hereunder, the "current per share market price" of
         any security (a "Security" for the purpose of this Section 11(d)(i)) on
         any date shall be deemed to be the average of the daily closing prices
         per share of such Security for the 30 consecutive Trading Days (as such
         term is hereinafter defined) immediately prior to, but not including,
         such date; provided, however, that in the event that the current per
         share market price of the Security is determined during a period
         following the announcement by the issuer of such Security of (A) a
         dividend or distribution on such Security payable in shares of such
         Security or securities convertible into such shares, or (B) any
         subdivision, combination or reclassification of such Security, and
         prior to the expiration of 30 Trading Days after the ex-dividend date
         for such dividend or distribution, or the record date for such
         subdivision, combination or reclassification, then, and in each such
         case, the current per share market price shall be appropriately
         adjusted to reflect the current market price per share equivalent of
         such Security. The closing price for each day shall be the last sale
         price, regular way, or, in case no such sale takes place on such day,
         the average of the closing bid and asked prices, regular way, in either
         case as reported by the principal consolidated transaction reporting
         system with respect to securities listed or admitted to trading on the
         NASDAQ Stock Market or, if the

                                       16
<PAGE>   20

         Security is not listed or admitted to trading on the NASDAQ. Stock
         Market, as reported in the principal consolidated transaction reporting
         system with respect to securities listed on the principal national
         securities exchange on which the Security is listed or admitted to
         trading or, if the Security is not listed or admitted to trading on any
         national securities exchange, the last quoted price or, if not so
         quoted, the average of the high bid and low asked prices in the
         over-the-counter market or such other system then in use, or, if on any
         such date the Security is not quoted by any organization in the
         over-the-counter market, the average of the closing bid and asked
         prices as furnished by a professional market maker making a market in
         the Security selected by the Board of Directors of the Company. The
         term "Trading Day" shall mean a day on which the principal national
         securities exchange on which the Security is listed or admitted to
         trading is open for the transaction of business or, if the Security is
         not listed or admitted to trading on any national securities exchange,
         a Business Day.

                   (ii) For the purpose of any computation hereunder, if the
         Preferred Stock is publicly traded, the "current per share market
         price" of the Preferred Stock shall be determined in accordance with
         the method set forth in Section 11(d)(i). If the Preferred Stock is not
         publicly traded but the Common Stock is publicly traded, the "current
         per share market price" of the Preferred Stock shall be conclusively
         deemed to be the current per share market price of the Common Stock as
         determined pursuant to Section 11(d)(i) multiplied by one thousand
         (appropriately adjusted to reflect any stock split, stock dividend or
         similar transaction occurring after the date hereof). If neither the
         Common Stock nor the preferred Stock is publicly traded, "current per
         share market price" shall mean the fair value per share as determined
         in good faith by the Board of Directors of the Company, whose
         determination shall be described in a statement filed with the Rights
         Agent.

                   (e) No adjustment in the Purchase Price shall be required
         unless such adjustment would require an increase or decrease of at
         least 1% in the Purchase Price; provided, however, that any adjustments
         which by reason of this Section 11(e) are not required to be made shall
         be carried forward and taken into account in any subsequent adjustment.
         All calculations under this Section 11 shall be made to the nearest
         cent or to the nearest one ten-thousandth of a share of Preferred Stock
         or share of Common Stock or other share or security as the case may be.
         Notwithstanding the first sentence of this Section 11(e), any
         adjustment required by this Section 11 shall be made no later than the
         earlier of (i) three years from the date of the transaction which
         requires such adjustment or (ii) the date of the expiration of the
         right to exercise any Rights.

                   (f) If as a result of an adjustment made pursuant to Section
         11(a) hereof, the holder of any Right thereafter exercised shall become
         entitled to receive any shares of capital stock of the Company other
         than the Preferred Stock, thereafter the Purchase Price and the number
         of such other shares so receivable upon exercise of a Right shall be
         subject to adjustment from time to time in a manner and on terms as
         nearly equivalent as practicable

                                       17
<PAGE>   21

         to the provisions with respect to the Preferred Stock contained in
         Sections 11(a), 11(b), 11(c), 11(e), 11(h), 11(i) and 11(m), and the
         provisions of Sections 7, 9, 10, 13 and 14 hereof with respect to the
         Preferred Stock shall apply on like terms to any such other shares.

                   (g) All Rights originally issued by the Company subsequent to
         any adjustment made to the Purchase Price hereunder shall evidence the
         right to purchase, at the adjusted Purchase Price, the number of one
         one-thousandths of a share of Preferred Stock purchasable from time to
         time hereunder upon exercise of the Rights, all subject to further
         adjustment as provided herein.

                   (h) Unless the Company shall have exercised its election as
         provided in Section 11(i), upon each adjustment of the Purchase Price
         as a result of the calculations made in Sections 11(b) and (c), each
         Right outstanding immediately prior to the making of such adjustment
         shall thereafter evidence the right to purchase, at the adjusted
         Purchase Price, that number of one one-thousandths of a share of
         Preferred Stock (calculated to the nearest one ten-thousandth of a
         share of Preferred Stock) obtained by (i) multiplying (x) the number of
         one one-thousandths of a share covered by a Right immediately prior to
         such adjustment by (y) the Purchase Price in effect immediately prior
         to such adjustment of the Purchase Price and (ii) dividing the product
         so obtained by the Purchase Price in effect immediately after such
         adjustment of the Purchase Price.

                   (i) The Company may elect on or after the date of any
         adjustment of the Purchase Price to adjust the number of Rights, in
         substitution for any adjustment in the number of one one-thousandths of
         a share of Preferred Stock purchasable upon the exercise of a Right.
         Each of the Rights outstanding after such adjustment of the number of
         Rights shall be exercisable for the number of one one-thousandths of a
         share of Preferred Stock for which a Right was exercisable immediately
         prior to such adjustment. Each Right held of record prior to such
         adjustment of the number of Rights shall become that number of Rights
         (calculated to the nearest one ten-thousandth) obtained by dividing the
         Purchase Price in effect immediately prior to adjustment of the
         Purchase Price by the Purchase Price in effect immediately after
         adjustment of the Purchase Price. The Company shall make a public
         announcement of its election to adjust the number of Rights (with
         prompt notice thereof to the Rights Agent), indicating the record date
         for the adjustment, and, if known at the time, the amount of the
         adjustment to be made. This record date may be the date on which the
         Purchase Price is adjusted or any day thereafter, but, if the Right
         Certificates have been issued, shall be at least 10 days later than the
         date of the public announcement. If Right Certificates have been
         issued, upon each adjustment of the number of Rights pursuant to this
         Section 11(i), the Company may, as promptly as practicable, cause to be
         distributed to holders of record of Right Certificates on such record
         date Right Certificates evidencing, subject to Section 14 hereof, the
         additional Rights to which such holders shall be entitled as a result
         of such adjustment, or, at the option of the Company, shall cause to be
         distributed to such holders

                                       18
<PAGE>   22

         of record in substitution and replacement for the Right Certificates
         held by such holders prior to the date of adjustment, and upon
         surrender thereof, if required by the Company, new Right Certificates
         evidencing all the Rights to which such holders shall be entitled after
         such adjustment. Right Certificates so to be distributed shall be
         issued, executed and countersigned in the manner provided for herein
         and shall be registered in the names of the holders of record of Right
         Certificates on the record date specified in the public announcement.

                   (j) Irrespective of any adjustment or change in the Purchase
         Price or the number of one one-thousandths of a share of Preferred
         Stock issuable upon the exercise of the Rights, the Right Certificates
         theretofore and thereafter issued may continue to express the Purchase
         Price and the number of one one-thousandths of a share of Preferred
         Stock which were expressed in the initial Right Certificates issued
         hereunder.

                   (k) Before taking any action that would cause an adjustment
         reducing the Purchase Price below the then par value, if any, of the
         Preferred Stock or other shares-of capital stock issuable upon exercise
         of the Rights, the Company shall take any corporate action which may,
         in the opinion of its counsel, be necessary in order that the Company
         may validly and legally issue fully paid and nonassessable shares of
         Preferred Stock or other such shares at such adjusted Purchase Price.

                   (l) In any case in which this Section 11 shall require that
         an adjustment in the Purchase Price be made effective as of a record
         date for a specified event, the Company may elect to defer (and shall
         promptly notify the Rights Agent of any such election) until the
         occurrence of such event the issuing to the holder of any Right
         exercised after such record date of the Preferred Stock and other
         capital stock or securities of the Company, if any, issuable upon such
         exercise over and above the Preferred Stock and other capital stock or
         securities of the Company, if any, issuable upon such exercise on the
         basis of the Purchase Price in effect prior to such adjustment;
         provided, however, that the Company shall deliver to such holder a due
         bill or other appropriate instrument evidencing such holder's right to
         receive such additional shares upon the occurrence of the event
         requiring such adjustment.

                   (m) Anything in this Section 11 to the contrary
         notwithstanding, the Company shall be entitled to make such reductions
         in the Purchase Price, in addition to those adjustments expressly
         required by this Section 11, as and to the extent that it in its sole
         discretion shall determine to be advisable in order that any
         consolidation or subdivision of the Preferred Stock, issuance wholly
         for cash of any shares of Preferred Stock at less than the current
         market price, issuance wholly for cash or Preferred Stock or securities
         which by their terms are convertible into or exchangeable for Preferred
         Stock, dividends on Preferred Stock payable in shares of Preferred
         Stock or issuance of rights, options or warrants referred to

                                       19
<PAGE>   23

         herein above in Section 11(b), hereafter made by the Company to holders
         of its Preferred Stock shall not be taxable to such stockholders.

                   (n) Anything in this Agreement to the contrary
         notwithstanding, in the event that at any time after the date of this
         Agreement and prior to the Distribution Date, the Company shall (i)
         declare or pay any dividend on the Common Stock payable in Common Stock
         or (ii) effect a subdivision, combination or consolidation of the
         Common Stock (by reclassification or otherwise than by payment of a
         dividend payable in Common Stock) into a greater or lesser number of
         Common Stock, then in any such case, the number of Rights associated
         with each share of Common Stock then outstanding, or issued or
         delivered thereafter, shall be proportionately adjusted so that the
         number of Rights thereafter associated with each share of Common Stock
         following any such event shall equal the result obtained by multiplying
         the number of Rights associated with each share of Common Stock
         immediately prior to such event by a fraction the numerator of which
         shall be the total number of shares of Common Stock outstanding
         immediately prior to the occurrence of the event and the denominator of
         which shall be the total number of shares of Common Stock outstanding
         immediately following the occurrence of such event.

                   (o) The Company agrees that, after the earlier of the
         Distribution Date or the Stock Acquisition Date, it will not, except as
         permitted by Sections 23, 24 or 27 hereof, take (or permit any
         Subsidiary to take) any action if at the time such action is taken it
         is reasonably foreseeable that such action will diminish substantially
         or eliminate the benefits intended to be afforded by the Rights.

         Section 12. Certificate of Adjusted Purchase Price or Number of Shares.
Whenever an adjustment is made as provided in Section 11 or 13 hereof, the
Company shall promptly (a) prepare a certificate setting forth such adjustment,
and a brief statement of the facts, computations and methodology accounting for
such adjustment, (b) file with the Rights Agent and with each transfer agent for
the Common Stock or the Preferred Stock a copy of such certificate and (c) mail
a brief summary thereof to each holder of a Right Certificate in accordance with
Section 25 hereof (if so required under Section 25 hereof). The Rights Agent
shall be fully protected in relying on any such certificate and on any
adjustment therein contained, and shall have no duty with respect to, and shall
not be deemed to have knowledge of any such adjustment unless and until it shall
have received such certificate.

         Section 13. Consolidation, Merger or Sale or Transfer of Assets or
Earnings Power. (a) In the event, directly or indirectly, at any time after any
Person has become an Acquiring Person, (i) the Company shall merge with and into
any other Person, (ii) any Person shall consolidate with the Company, or any
Person shall merge with and into the Company and the Company shall be the
continuing or surviving corporation of such merger and, in connection with such
merger, all or part of the Common Stock shall be changed into-or exchanged for
stock or other securities of any other

                                       20
<PAGE>   24

Person (or of the Company) or cash or any other property, or (iii) the Company
shall sell or otherwise transfer (or one or more of its Subsidiaries shall sell
or otherwise transfer), in one or more transactions, assets or earning power
aggregating 50% or more of the assets or earning power of the Company and its
Subsidiaries (taken as a whole) to any other Person (other than the Company or
one or more of its wholly-owned Subsidiaries), then upon the first occurrence of
such event, proper provision shall be made so that: (A) each holder of record of
a Right (other than Rights which have become void pursuant to Section 11(a)(ii))
shall thereafter have the right to receive, upon the exercise thereof at a price
equal to the then current Purchase Price multiplied by the number of one
one-thousandths of a share of Preferred Stock for which a Right was exercisable
(whether or not such Right was then exercisable) immediately prior to the time
that any Person first became an Acquiring Person (each as subsequently adjusted
thereafter pursuant to Sections 11(a)(i), 11(b), 11(c), 11(h), 11(i) and 11(m)),
in accordance with the terms of this Agreement and in lieu of Preferred Stock,
such number of validly issued, fully paid and non-assessable and freely
tradeable shares of Common Stock of the Principal Party (as defined herein) not
subject to any liens, encumbrances, rights of first refusal or other adverse
claims, as shall be equal to the result obtained by (1) multiplying the then
current Purchase Price by the number of one one-thousandths of a share of
Preferred Stock for which a Right was exercisable immediately prior to the time
that any Person first became an Acquiring Person (as subsequently adjusted
thereafter pursuant to Sections 11(a)(i), 11(b), 11(c), 11(h), 11(i) and 11(m))
and (2) dividing that product by 50% of the then current per share market price
of the Common Stock of such Principal Party (determined pursuant to Section
11(d)(i) hereof) on the date of consummation of such consolidation, merger, sale
or transfer; provided that the Purchase Price and the number of shares of Common
Stock of such Principal Party issuable upon exercise of each Right shall be
further adjusted as provided in Section 11(f) of this Agreement to reflect any
events occurring in respect of such Principal Party after the date of the such
consolidation, merger, sale or transfer; (B) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such-consolidation,
merger, sale or transfer, all the obligations and duties of the Company pursuant
to this Agreement; (C) the term "Company" shall thereafter be deemed to refer to
such Principal Party; and (D) such Principal Party shall take such steps
(including, but not limited to, the reservation of a sufficient number of its
shares of Common Stock in accordance with Section 9 hereof) in connection with
such consummation of any such transaction as may be necessary to assure that the
provisions hereof shall thereafter be applicable, as nearly as reasonably may
be, in relation to the shares of its Common Stock thereafter deliverable upon
the exercise of the Rights; provided that, upon the subsequent occurrence of any
consolidation, merger, sale or transfer of assets or other extraordinary
transaction in respect of such Principal Party, each holder of a Right shall
thereupon be entitled to receive, upon exercise of a Right and payment of the
Purchase Price as provided in this Section 13(a), such cash, shares, rights,
warrants and other property which such holder would have been entitled to
receive had such holder, at the time of such transaction, owned the Common Stock
of the Principal Party receivable upon the exercise of a Right pursuant to this
Section 13(a), and such Principal Party shall take such steps (including, but
not limited to, reservation of shares of stock) as may be necessary to permit
the subsequent exercise of the Rights in accordance with the terms hereof for
such cash, shares, rights, warrants and other property.

                                       21
<PAGE>   25

         (b) "Principal Party" shall mean

             (i) in the case of any transaction described in (i) or (ii) of the
         first sentence of Section 13(a) hereof: (A) the Person that is the
         issuer of the securities into which the shares of Common Stock are
         converted in such merger or consolidation, or, if there is more than
         one such issuer, the issuer the shares of Common Stock of which have
         the greatest aggregate market value of shares outstanding, or if no
         securities are so issued, (x) the Person that is the other party to the
         merger, if such Person survives said merger, or, if there is more than
         one such Person, the Person the shares of Common Stock of which have
         the greatest aggregate market value of shares outstanding or (y) if the
         Person that is the other party to the merger does not survive the
         merger, the Person that does survive the merger (including the Company
         if it survives) or (z) the Person resulting from the consolidation; and

             (ii) in the case of any transaction described in (iii) of the first
         sentence in Section 13(a) hereof, the Person that is the party
         receiving the greatest portion of the assets or earning power
         transferred pursuant to such transaction or transactions, or, if each
         Person that is a party to such transaction or transactions receives the
         same portion of the assets or earning power so transferred or if the
         Person receiving the greatest portion of the assets or earning power
         cannot be determined, whichever of such Persons as is the issuer of
         Common Stock having the greatest aggregate market value of shares
         outstanding;

provided, however, that in any such case described in the foregoing clause
(b)(i) or (b)(ii), if the Common Stock of such Person is not at such time or has
not been continuously over the preceding 12-month period registered under
Section 12 of the Exchange Act, then (1) if such Person is a direct or indirect
Subsidiary of another Person the Common Stock of which is and has been so
registered, the term "Principal Party" shall refer to such other Person, or (2)
if such Person is a Subsidiary, directly or indirectly, of more than one Person,
the Common Stock of all of which is and has been so registered, the term
"Principal Party" shall refer to whichever of such Persons is the issuer of
Common Stock having the greatest aggregate market value of shares outstanding,
or (3) if such Person is owned, directly or indirectly, by a joint venture
formed by two or more Persons that are not owned, directly or indirectly, by the
same Person, the rules set forth in clauses (1) and (2) above shall apply to
each of the owners having an interest in the venture as if the Person owned by
the joint venture was a Subsidiary of both or all of such joint venturers, and
the Principal Party in each such case shall bear the obligations set forth in
this Section 13 in the same ratio as its interest in such Person bears to the
total of such interests.

                   (c) The Company shall not consummate any consolidation,
         merger, sale or transfer referred to in Section 13(a) hereof unless
         prior thereto the Company and the

                                       22
<PAGE>   26
         Principal Party involved therein shall have executed and delivered to
         the Rights Agent an agreement confirming that the requirements of
         Sections 13(a) and (b) hereof shall promptly be performed in accordance
         with their terms and that such consolidation, merger, sale or transfer
         of assets shall not result in a default by the Principal Party under
         this Agreement as the same shall have been assumed by the Principal
         Party pursuant to Sections 13(a) and (b) hereof and providing that, as
         soon as practicable after executing such agreement pursuant to this
         Section 13, the Principal Party will:

                        (i) prepare and file a registration statement under the
                   Securities Act, if necessary, with respect to the Rights and
                   the securities purchasable upon exercise of the Rights on an
                   appropriate form, use its best efforts to cause such
                   registration statement to become effective as soon as
                   practicable after such filing and use its best efforts to
                   cause such registration statement to remain effective (with a
                   prospectus at all times meeting the requirements of the
                   Securities Act) until the Final Expiration Date, and
                   similarly comply with applicable state securities laws;

                        (ii) use its best efforts, if the Common Stock of the
                   Principal Party shall be listed or admitted to trading on the
                   NASDAQ Stock Market or on another national securities
                   exchange, to list or admit to trading (or continue the
                   listing of) the Rights and the securities purchasable upon
                   exercise of the Rights on the NASDAQ Stock Market or such
                   securities exchange, or, if the Common Stock of the Principal
                   Party shall not be listed or admitted to trading on the
                   NASDAQ Stock Market or a national securities exchange, to
                   cause the Rights and the securities receivable upon exercise
                   of the Rights to be reported by such other system then in
                   use;

                        (iii) deliver to holders of the Rights historical
                   financial statements for the Principal Party which comply in
                   all respects with the requirements for registration on Form
                   10 (or any successor form) under the Exchange Act; and

                        (iv) obtain waivers of any rights of first refusal or
                   preemptive rights in respect of the Common Stock of the
                   Principal Party subject to purchase upon exercise of
                   outstanding Rights.

                   (d) In case the Principal Party has provision in any of its
         authorized securities or in its certificate of incorporation or by-laws
         or other instrument governing its corporate affairs, which provision
         would have the effect of (i) causing such Principal Party to issue
         (other than to holders of Rights pursuant to this Section 13), in
         connection with, or as a consequence of, the consummation of a
         transaction referred to in this Section 13, shares of Common Stock of
         such Principal Party at less than the then current market price per
         share thereof (determined pursuant to Section 11(d) hereof) or
         securities exercisable for, or convertible into, Common Stock of such
         Principal Party at less than such then current market

                                       23
<PAGE>   27

         price, or (ii) providing for any special payment, tax or similar
         provision in connection with the issuance of the Common Stock of such
         Principal Party pursuant to the provisions of Section 13, then, in such
         event, the Company hereby agrees with each holder of Rights that it
         shall not consummate any such transaction unless prior thereto the
         Company and such Principal Party shall have executed and delivered to
         the Rights Agent a supplemental agreement providing that the provision
         in question of such Principal Party shall have been canceled, waived or
         amended, or that the authorized securities shall be redeemed, so that
         the applicable provision will have no effect in connection with, or as
         a consequence of, the consummation of the proposed transaction.

                   (e) The Company covenants and agrees that it shall not, at
         any time after a Person first becomes an Acquiring Person, enter into
         any transaction of the type contemplated by (i) - (iii) of Section
         13(a) hereof if (x) at the time of or immediately after such
         consolidation, merger, sale, transfer or other transaction there are
         any rights, warrants or other instruments or securities outstanding or
         agreements in effect which would substantially diminish or otherwise
         eliminate the benefits intended to be afforded by the Rights, (y) prior
         to, simultaneously with or immediately after such consolidation,
         merger, sale, transfer of other transaction, the stockholders of the
         Person who constitutes, or would constitute, the Principal Party for
         purposes of Section 13(a) hereof shall have received a distribution of
         Rights previously owned by such Person or any of its Affiliates or
         Associates or (z) the form or nature of organization of the Principal
         Party would preclude or limit the exercisability of the Rights.

         Section 14. Fractional Rights and Fractional Shares. (a) The Company
shall not be required to issue fractions of Rights or to distribute Right
Certificates which evidence fractional Rights. In lieu of such fractional
Rights, there shall be paid to the registered holders of the Right Certificates
with regard to which such fractional Rights would otherwise be issuable, an
amount in cash equal to the same fraction of the current market value of a whole
Right. For the purposes of this Section 14(a), the current market value of a
whole Right shall be the closing price of the Rights for the Trading Day
immediately prior to the date on which such fractional Rights would have been
otherwise issuable. The closing price for any day shall be the last sale price,
regular way, or, in case no such sale takes place on such day, the average of
the closing bid and asked prices, regular way, in either case as reported in the
principal consolidated transaction reporting system with respect to securities
listed or admitted to trading on the NASDAQ Stock Market, or, if the Rights are
not listed or admitted to trading on the NASDAQ Stock Market, as reported in the
principal consolidated transaction reporting system with respect to securities
listed on the principal national securities exchange on which the Rights are
listed or admitted to trading or, if the Rights are not listed or admitted to
trading on any national securities exchange, the last quoted price or, if not so
quoted, the average of the high bid and low asked prices in the over-the-counter
market, as reported by any system then in use or, if on any such date the Rights
are not quoted by any organization in the over-the-counter market, the average
of the closing bid and asked prices as furnished by a

                                       24
<PAGE>   28

professional market maker making a market in the Rights selected by the Board of
Directors of the Company. If on any such date no such market maker is making a
market in the Rights, the fair value of the Rights on such date as determined in
good faith by the Board of Directors of the Company shall be used.

                   (b) The Company shall not be required to issue fractions of
         Preferred Stock (other than fractions which are integral multiples of
         one one-thousandth of a share of Preferred Stock) upon exercise of the
         Rights or to distribute certificates which evidence fractional shares
         of Preferred Stock (other than fractions which are integral multiples
         of one one-thousandth of a share of Preferred Stock). Interests in
         fractions of Preferred Stock in integral multiples of one
         one-thousandth of a share of Preferred Stock may, at the election of
         the Company, be evidenced by depositary receipts, pursuant to an
         appropriate agreement between the Company and a depositary selected by
         it; provided, that such agreement shall provide that the holders of
         such depositary receipts shall have all the rights, privileges and
         preferences to which they are entitled as Beneficial Owners of the
         Preferred Stock represented by such depositary receipts. In lieu of
         fractional shares of Preferred Stock that are not integral multiples of
         one one-thousandth of a share of Preferred Stock, the Company shall pay
         to the registered holders of Right Certificates at the time such Rights
         are exercised as herein provided an amount in cash equal to the same
         fraction of the current market value of one share of Preferred Stock.
         For the purposes of this Section 14(b), the current market value of a
         share of Preferred Stock shall be the closing price of a share of
         Preferred Stock (as determined pursuant to Section 11(d)(i) hereof) for
         the Trading Day immediately prior to the date of such exercise.

                   (c) The holder of a Right by the acceptance of the Right
         expressly waives his or her right to receive any fractional Rights or
         any fractional shares upon exercise of a Right (except as provided
         above).

                   (d) The Rights Agent shall have no duty or obligations with
         respect to this Section 14 unless and until it has received specific
         instructions (and sufficient cash, if required) from the Company with
         respect to its duties and obligations under such Section.

         Section 15. Rights of Action. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Stock); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Stock), without the consent of the Rights
Agent or of the holder of any other Right Certificate (or, prior to the
Distribution Date, of the Common Stock), on his or her own behalf and for his or
her own benefit, may enforce, and may institute and maintain any suit, action or
proceeding against the Company to enforce, or otherwise act in respect of, his
or her right to exercise the Rights evidenced by such Right Certificate (or,
prior to the Distribution Date, such

                                       25
<PAGE>   29

Common Stock) in the manner provided in such Right Certificate and in this
Agreement. Without limiting the foregoing or any remedies available to the
holders of Rights, it is specifically acknowledged that the holders of Rights
would not have an adequate remedy at law for any breach of this Agreement and
will be entitled to specific performance of the obligations under, and
injunctive relief against actual or threatened violations of, the obligations of
any Person subject to this Agreement.

         Section 16. Agreement of Right Holders. Every holder of a Right, by
accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

                 (a) prior to the Distribution Date, the Rights will be
         transferable only in connection with the transfer of the Common Stock;

                 (b) after the Distribution Date, the Right Certificates are
         transferable only on the registry books of the Rights Agent if
         surrendered at the office or agency of the Rights Agent designated for
         such purpose, duly endorsed or accompanied by a proper instrument of
         transfer; and

                 (c) the Company and the Rights Agent may deem and treat the
         Person in whose name the Right Certificate (or, prior to the
         Distribution Date, the Common Stock certificate) is registered as the
         absolute owner thereof and of the Rights evidenced thereby
         (notwithstanding any notations of ownership or writing on the Right
         Certificate or the Common Stock certificate made by anyone other than
         the Company or the Rights Agent) for all purposes whatsoever, and
         neither the Company nor the Rights Agent shall be affected by any
         notice to the contrary.

         Section 17. Right Certificate Holder Not Deemed a Stockholder. No
holder, as such, of any Right Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Preferred Stock or any
other securities of the Company which may at any time be issuable on the
exercise of the Rights represented thereby, nor shall anything contained herein
or in any Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a stockholder of the Company or any
right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in this Agreement), or to receive dividends or
subscription rights, or otherwise, until the Rights evidenced by such Right
Certificate shall have been exercised in accordance with the provisions hereof.

         Section 18. Concerning the Rights Agent. (a) The Company agrees to pay
to the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on

                                       26
<PAGE>   30

demand of the Rights Agent, its reasonable expenses and counsel fees and other
disbursements incurred in the preparation, delivery, amendment, administration
and execution of this Agreement and the exercise and performance of its duties
hereunder. The Company also agrees to indemnify the Rights Agent for, and to
hold it harmless against, any loss, liability, damage, judgment (interlocutory
or final), fine, penalty, claim, demand, settlement, cost or expense, incurred
without gross negligence, bad faith or willful misconduct (as finally determined
by a court of competent jurisdiction) on the part of the Rights Agent, for any
action taken, suffered or omitted by the Rights Agent in connection with the
acceptance and administration of this Agreement, including without limitation
the costs and expenses of defending against any claim of liability arising
therefrom, directly or indirectly. The indemnity provided herein shall survive
the termination of this Agreement and the termination and expiration of the
Rights. The costs and expenses incurred in enforcing this right of
indemnification shall be paid by the Company. Anything to the contrary
notwithstanding, in no event shall the Rights Agent be liable for special,
punitive, indirect, consequential or incidental loss or damage of any kind
whatsoever (including, but not limited to lost profits), even if the Rights
Agent has been advised of the possibility of such loss or damage. Any liability
of the Rights Agent under this Rights Agreement will be limited to the amount of
fees paid by the Company to the Rights Agent hereunder.

         (b) The Rights Agent shall be authorized to rely on, and shall be
protected and shall incur no liability for, or in respect of any action taken,
suffered or omitted by it in connection with the acceptance and administration
of this Agreement in reliance upon any Right Certificate or certificate for the
Preferred Stock, Common Stock or for other securities of the Company, instrument
of assignment or transfer, power of attorney, endorsement, affidavit, letter,
notice, direction, consent, certificate, statement, or other paper or document
believed by it to be genuine and to be signed, executed and, where necessary,
verified or acknowledged, by the proper Person or Persons, or otherwise upon the
advice of counsel as set forth in Section 20 hereof. The Rights Agent shall be
fully protected in relying on any such certificate and on any adjustment therein
contained. The Rights Agent shall not be deemed to have any duty or notice
unless and until the Company has provided the Rights Agent with written notice.

         Section 19. Merger or Consolidation or Change of Name of Rights Agent.
(a) Any Person into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any Person resulting from any
merger or consolidation to which the Rights Agent or any successor Rights Agent
shall be a party, or any Person succeeding to the shareholder services business
of the Rights Agent or any successor Rights Agent, shall be the successor to the
Rights Agent under this Agreement without the execution or filing of any paper
or any further act on the part of any of the parties hereto; provided, that such
Person would be eligible for appointment as a successor Rights Agent under the
provisions of Section 21 hereof. In case at the time such successor Rights Agent
shall succeed to the agency created by this Agreement, any of the Right
Certificates shall have been countersigned but not delivered, any such successor
Rights Agent may adopt the countersignature of the predecessor Rights Agent and
deliver such Right Certificates so

                                       27
<PAGE>   31

countersigned; and in case at that time any of the Right Certificates shall not
have been countersigned, any successor Rights Agent may countersign such Right
Certificates either in the name of the predecessor Rights Agent or in the name
of the successor Rights Agent; and in all such cases such Right Certificates
shall have the full force provided in the Right Certificates and in this
Agreement.

         (b) In case at any time the name of the Rights Agent shall be changed
and at such time any of the Right Certificates shall have been countersigned but
not delivered, the Rights Agent may adopt the countersignature under its prior
name and deliver Right Certificates so countersigned; and in case at that time
any of the Right Certificates shall not have been countersigned, the Rights
Agent may countersign such Right Certificates either in its prior name or in its
changed name and in all such cases such Right Certificates shall have the full
force provided in the Right Certificates and in this Agreement.

         Section 20. Duties of Rights Agent. The Rights Agent undertakes the
duties and obligations, and only the duties and obligations, expressly imposed
by this Agreement (and no implied duties or obligations) upon the following
terms and conditions, by all of which the Company and the holders of Right
Certificates, by their acceptance thereof, shall be bound:

                 (a) The Rights Agent may consult with legal counsel (who may be
         legal counsel for the Company), and the advice or opinion of such
         counsel shall be full and complete authorization and protection to the
         Rights Agent, and the Rights Agent shall incur no liability for or in
         respect of, any action taken, suffered or omitted by it in good faith
         and in accordance with such advice or opinion.

                 (b) Whenever in the performance of its duties under this
         Agreement the Rights Agent shall-deem it necessary or desirable that
         any fact or matter be proved or established by the Company prior to
         taking, suffering or omitting any action hereunder, such fact or matter
         (unless other evidence in respect thereof be herein specifically
         prescribed) may be deemed to be conclusively proved and established by
         a certificate signed by any one of the Chairman of the Board of
         Directors, the President, any Vice President, the Treasurer or the
         Secretary of the Company and delivered to the Rights Agent; and such
         certificate shall be full authorization and protection to the Rights
         Agent for and the Rights Agent shall incur no liability for or in
         respect of any action taken, suffered or omitted in good faith by it
         under the provisions of this Agreement in reliance upon such
         certificate.

                 (c) The Rights Agent shall be liable hereunder to the
         Company and any other Person only for its own gross negligence, bad
         faith or wilful misconduct.

                 (d) The Rights Agent shall not be liable for or by reason of
         any of the statements of fact or recitals contained in this Agreement
         or in the Right Certificates (except its

                                       28
<PAGE>   32

         countersignature thereof) or be required to verify the same, but all
         such statements and recitals are and shall be deemed to have been made
         by the Company only.

                 (e) The Rights Agent shall not have any liability for, nor
         be under any responsibility in respect of, the validity of this
         Agreement or the execution and delivery hereof (except the due
         execution hereof by the Rights Agent) or in respect of the validity or
         execution of any Right Certificate (except its countersignature
         thereof); nor shall it be responsible for any breach by the Company of
         any covenant or condition contained in this Agreement or in any Right
         Certificate; nor shall it be responsible for any change in the
         exercisability of the Rights (including the Rights becoming null and
         void pursuant to Section 11(a)(ii) hereof) or any adjustment in the
         terms of the Rights (including the manner, method or amount thereof)
         provided for in Sections 3, 11, 13, 23 and 24, or the ascertaining of
         the existence of facts that would require any such change or adjustment
         (except with respect to the exercise of Rights evidenced by Right
         Certificates after receipt of a certificate furnished pursuant to
         Section 12, describing such change or adjustment); nor shall it by any
         act hereunder be deemed to make any representation or Warranty as to
         the authorization or reservation of any shares of Preferred Stock or
         other securities to be issued pursuant to this Agreement or any Right
         Certificate or as to whether any shares of Preferred Stock or other
         securities will, when issued, be validly authorized and issued, fully
         paid and nonassessable.

                 (f) The Company agrees that it will perform, execute,
         acknowledge and deliver or cause to be performed, executed,
         acknowledged and delivered all such further and other acts, instruments
         and assurances as may reasonably be required by the Rights Agent for
         the carrying out or performing by the Rights Agent of the provisions of
         this Agreement.

                 (g) The Rights Agent is hereby authorized and directed to
         accept instructions with respect to the performance of its duties
         hereunder from any person reasonably believed by the Rights Agent to be
         one of the Chairman of the Board of Directors, the President, the Chief
         Financial Officer or the Secretary of the Company, and to apply to such
         officers for advice or instructions in connection with its duties, and
         it shall not be liable for any action taken, suffered or omitted by it
         in good faith in accordance with the advice or instructions of any such
         officer or for any delay in acting while waiting for such advice or
         instructions. The Rights Agent may conclusively rely on the most recent
         instructions given by any such officer. Any application by the Rights
         Agent for written instructions from the Company may, at the option of
         the Rights Agent, set forth in writing any action proposed to be taken
         or omitted by the Rights Agent under this Agreement and the date on
         and/or after which such action shall be taken or such omission shall be
         effective. The Rights Agent shall not be liable for any action taken
         by, or omission of, the Rights Agent in accordance with a proposal
         included in any such application on or after the date specified in such
         application (which date shall not be less than five Business Days after
         the date any officer of the Company actually receives such application,
         unless any such officer shall have consented in writing to an earlier

                                       29
<PAGE>   33

         date) unless, prior to taking any such action (or the effective date in
         the case of an omission), the Rights Agent shall have received written
         instructions in response to such application specifying the action to
         be taken or omitted.

                 (h) The Rights Agent and any stockholder, affiliate,
         director, officer or employee of the Rights Agent may buy, sell or deal
         in any of the Rights or other securities of the Company or become
         pecuniarily interested in any transaction in which the Company may be
         interested, or contract with or lend money to the Company or otherwise
         act as fully and freely as though it were not Rights Agent under this
         Agreement. Nothing herein shall preclude the Rights Agent from acting
         in any other capacity for the Company or for any other Person.

                 (i) The Rights Agent may execute and exercise any of the
         rights or powers hereby vested in it or perform any duty hereunder
         either itself or by or through its attorneys or agents, and the Rights
         Agent shall not be answerable or accountable for any act, default,
         neglect or misconduct of any such attorneys or agents or for any loss
         to the Company or any other Person resulting from any such act,
         default, neglect or misconduct; absent gross negligence, bad faith or
         willful misconduct in the selection and continued employment thereof.

                 (j) If, with respect to any Rights Certificate surrendered
         to the Rights Agent for exercise or transfer, the certificate contained
         in the form of assignment or the form of election to purchase set forth
         on the reverse thereof, as the case may be, has not been completed to
         certify the holder is not an Acquiring Person (or an Affiliate or
         Associate thereof), a Rights Agent shall not take any further action
         with respect to such requested exercise or transfer without first
         consulting with the Company. Without limiting the foregoing, unless
         either (i) the Rights Agent has been notified by the Company of the
         identity of an Acquiring Person or (ii) the certificate contained in
         the form of assignment or the form of election to purchase set forth on
         the reverse side of the Rights Certificate indicates that the assignee
         or the purchaser of such Rights Certificate is an Acquiring Person, the
         Rights Agent shall not be responsible for a Rights Certificate's
         assignment to or purchase by an Acquiring Person.

         Section 21. Change of Rights Agent. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon 30 days' notice in writing mailed to the Company and to each transfer agent
of the Common Stock or Preferred Stock by registered or certified mail, and,
following the Distribution Date, to the holders of the Right Certificates by
first-class mail. The Company may remove the Rights Agent or any successor
Rights Agent upon 30 days, notice in writing, mailed to the Rights Agent or
successor Rights Agent, as the case may be, and to each transfer agent of the
Common Stock or Preferred Stock by registered or certified mail, and, following
the Distribution Date, to the holders of the Right Certificates by first-class
mail. If the Rights Agent shall resign or be removed or shall otherwise become
incapable of

                                       30
<PAGE>   34

acting, the Company shall appoint a successor to the Rights Agent. If the
Company shall fail to make such appointment within a period of 30 days after
giving notice of such removal or after it has been notified in writing of such
resignation or incapacity by the resigning or incapacitated Rights Agent or by
the holder of a Right Certificate (who shall, with such notice, submit his or
her Right Certificate for inspection by the Company), then the registered holder
of any Right Certificate may apply to any court of competent jurisdiction for
the appointment of a new Rights Agent. Any successor Rights Agent, whether
appointed by the Company or by such a court, shall be (a) a Person organized and
doing business under the laws of the United States or any State thereof, in good
standing, which is subject to supervision or examination by federal or state
authority and which has at the time of its appointment as Rights Agent a
combined capital and surplus of at least $100 million or (b) an affiliate of
such a Person. After appointment, the successor Rights Agent shall be vested
with the same powers, rights, duties and responsibilities as if it had been
originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Common Stock or Preferred Stock, and, following the Distribution Date, mail
a notice thereof in writing to the registered holders of the Right Certificates.
Failure to give any notice provided for in this Section 21, however, or any
defect therein, shall not affect the legality or validity of the resignation or
removal of the Rights Agent or the appointment of the successor Rights Agent, as
the case may be.

         Section 22. Issuance of New Right Certificates. Notwithstanding any of
the provisions of this Agreement or of the Rights to the contrary, the Company
may, at its option, issue new Right Certificates evidencing Rights in such forms
as may be approved by its Board of Directors to reflect any adjustment or change
in the Purchase Price and the number or kind or class of shares or other
securities or property purchasable under the Rights Certificates made in
accordance with the provisions of this Agreement. In addition, in connection
with the issuance or sale of Common Stock following the Distribution Date and
prior to the earlier of the Redemption Date and the Final Expiration Date, the
Company may with respect to shares of Common Stock so issued or sold pursuant to
(i) the exercise of stock options, (ii) under any employee plan or arrangement,
(iii) upon the exercise, conversion or exchange of securities notes or
debentures issued by the Company or (iv) a contractual obligation of the Company
in each case existing prior to the Distribution Date, issue Rights Certificates
representing the appropriate number of Rights in connection with such issuance
or sale.

         Section 23. Redemption. (a) The Board of Directors of the Company may,
at any time prior to such time as any Person first becomes an Acquiring Person,
redeem all but not less than all the then outstanding Rights at a redemption
price of $.01 per Right, appropriately adjusted to reflect any stock split,
stock dividend or similar transaction occurring after the date hereof (the
redemption price being hereinafter referred to as the "Redemption Price"). The
redemption of the Rights may

                                       31
<PAGE>   35

be made effective at such time, on such basis and with such conditions as the
Company's Board of Directors in its sole discretion may establish.

         (b) Immediately upon the action of the Company's Board of Directors
ordering the redemption of the Rights pursuant to paragraph (a) of this Section
23 (or at such later time as the Board of Directors may establish for the
effectiveness of such redemption), promptly without any further action and
without any notice, the right to exercise the Rights will terminate and the only
right thereafter of the holders of Rights shall be to receive the Redemption
Price. The Company shall promptly give public notice of any such redemption;
provided, however, that the failure to give, or any defect in, any such notice
shall not affect the validity of such redemption. Within 10 days after such
action of the Board of Directors ordering the redemption of the Rights (or such
later time as the Board of Directors may establish for the effectiveness of such
redemption), the Company shall mail a notice of redemption to the Rights Agent
and all the holders of the then outstanding Rights at their last addresses (in
the case of notice to holders) as they appear upon the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
transfer agent for the Common Stock. Any notice which is mailed in the manner
herein provided shall be deemed given, whether or not the holder receives the
notice. Each such notice of redemption shall state the method by which the
payment of the Redemption Price will be made.

         Section 24. Exchange. (a) The Board of Directors of the Company may, at
its option, at any time after any Person first becomes an Acquiring Person,
exchange all or part of the then outstanding and exercisable Rights (which shall
not include Rights that have become null and void pursuant to the provisions of
Section 11(a)(ii) hereof) for shares of Common Stock at an exchange ratio of one
share of Common Stock per Right (such exchange ratio being hereinafter referred
to as the "Exchange Ratio"). Notwithstanding the foregoing, the Board of
Directors of the Company shall not be empowered to effect such exchange at any
time after (1) any Person (other than an Exempt Person), together with all
Affiliates and Associates of such Person, becomes the Beneficial Owner of shares
of Common Stock aggregating 50% or more of the shares of Common Stock then
outstanding or (2) the occurrence of an event specified in Section 13(a) hereof.

         (b) Immediately upon the action of the Board of Directors of the
Company ordering the exchange of any Rights pursuant to paragraph (a) of this
Section 24 and without any further action and without any notice, the right to
exercise such Rights shall terminate and the only right thereafter of the
holders of such Rights shall be to receive that number of shares of Common Stock
equal to the number of such Rights held by such holder multiplied by the
Exchange Ratio. The Company shall promptly give notice thereof to the Rights
Agent and shall promptly give public notice of any such exchange; provided,
however, that the failure to give, or any defect in, such notice shall not
affect the validity of such exchange. The Company shall promptly mail a notice
of any such exchange to the Rights Agent and to all of the holders of the Rights
so exchanged at their last addresses as they appear upon the registry books of
the Rights Agent. Any notice which is mailed in the manner herein provided shall
be deemed given, whether or not the holder receives the notice.

                                       32
<PAGE>   36

Each such notice of exchange will state the method by which the exchange of the
shares of Common Stock for Rights will be effected and, in the event of any
partial exchange, the number of Rights which will be exchanged. Any partial
exchange shall be effected pro rata based on the number of Rights (other than
Rights which have become null and void pursuant to the provisions of section
11(a)(ii) hereof) held by each holder of Rights.

         (c) It the event that there shall not be sufficient shares of Common
Stock issued but not outstanding or authorized but unissued to permit any
exchange of Rights as contemplated in accordance with this Section 24, the
Company may, in its discretion, take such action as may be necessary to
authorize additional shares of Common Stock for issuance upon exchange of the
Rights. In the event that the Company shall determine not to take such action or
shall, after good faith effort, be unable to take such action as may be
necessary to authorize such additional shares of Common Stock, the Company shall
substitute, to the extent of such insufficiency, for each share of Common Stock
that would otherwise be issuable upon exchange of a Right, a number of shares of
Preferred Stock or fractions thereof (or equivalent preferred shares as such
term is defined in Section 11(b)) having an aggregate current per share market
price (determined pursuant to Section 11(d) hereof) equal to the current per
share market price of one share of Common Stock (determined pursuant to Section
11(d) hereof) as of the date of issuance of such shares of Preferred Stock or
fractions thereof (or equivalent preferred shares).

         (d) The Company shall not, in connection with any exchange pursuant
to this Section 24, be required to issue fractions of shares of Common Stock or
to distribute certificates which evidence fractional shares of Common Stock. In
lieu of such fractional shares of Common Stock, the Company shall pay to the
registered holders of the Right Certificates with regard to which such
fractional shares of Common Stock would otherwise be issuable an amount in cash
equal to the same fraction of the current market value of a whole share of
Common Stock. For the purposes of this paragraph (d), the current market value
of a whole share of Common Stock shall be the closing price of a share of Common
Stock (as determined pursuant to the second sentence of Section 11(d)(i) hereof)
for the Trading Day immediately prior to the date of exchange pursuant to this
Section 24.

         Section 25. Notice of Certain Events. (a) In case the Company shall at
any time after the earlier of the Distribution Date or the Stock Acquisition
Date propose (i) to pay any dividend payable in stock of any class to the
holders of its Preferred Stock or to make any other distribution to the holders
of its Preferred Stock (other than a regular quarterly cash dividend), (ii) to
offer to the holders of its Preferred Stock rights or warrants to subscribe for
or to purchase any additional shares of Preferred Stock or shares of stock of
any class or any other securities, rights or options, (iii) to effect any
reclassification of its Preferred Stock (other than a reclassification involving
only the subdivision of outstanding Preferred Stock), (iv) to effect the
liquidation, dissolution or winding up of the Company, or (v) to declare or pay
any dividend on the Common Stock payable in Common Stock or to effect a
subdivision, combination or consolidation of the Common Stock (by
reclassification or otherwise than by payment of dividends in Common Stock),
then, in each such

                                       33
<PAGE>   37

case, the Company shall give to the Rights Agent and to each holder of a Right
Certificate, in accordance with Section 26 hereof, a notice of such proposed
action, which shall specify the record date for the purposes of such stock
dividend, or distribution of rights or warrants, or the date on which such
liquidation, dissolution or winding up is to take place and the date of
participation therein by the holders of the Common Stock and/or Preferred Stock,
if any such date is to be fixed, and such notice shall be so given in the case
of any action covered by clause (i) or (ii) above at least 10 days prior to the
record date for determining holders of the Preferred Stock for purposes of such
action, and in the case of any such other action, at least 10 days prior to the
date of the taking of such proposed action or the date of participation therein
by the holders of the Common Stock and/or Preferred Stock, whichever shall be
the earlier.

         (b) In case any event described in Section 11(a)(ii) or Section 13
shall occur then the Company shall as soon as practicable thereafter give to the
Rights Agent and to each holder of a Right Certificate (or if occurring prior to
the Distribution Date, the holders of the Common Stock) in accordance with
Section 26 hereof, a notice of the occurrence of such event, which notice shall
describe such event and the consequences of such event to holders of Rights
under Section 11(a)(ii) and Section 13 hereof.

         Section 26. Notices. Notices or demands authorized by this Agreement to
be given or made by the Rights Agent or by the holder of any Right Certificate
to or on the Company shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

                      American Homestar Corporation
                      2450 South Shore Blvd., Suite 300
                      League City, Texas 77573
                      Attention: Corporate Secretary

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Company or by the holder of any
Right Certificate to or on the Rights Agent shall be sufficiently given or made
if sent by first-class mail, postage prepaid, addressed (until another address
is filed in writing with the Company) as follows:

                      ChaseMellon Shareholder Services, L.L.C.
                      450 W. 33rd St.
                      New York, NY 10001
                      Attention: Vice-President

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate shall be
sufficiently given or made if sent by first-class

                                       34
<PAGE>   38

mail, postage prepaid, addressed to such holder at the address of such holder as
shown on the registry books of the Company.

         Section 27. Supplements and Amendments. Except as is otherwise provided
in this Section 27, for so long as the Rights are then redeemable, the Company
may in its sole and absolute discretion, and the Rights Agent shall if the
Company so directs, supplement or amend any provision of this Agreement in any
respect without the approval of any holders of the Rights. At any time when the
Rights are no longer redeemable, except as provided in the penultimate sentence
of this Section 27, the Company may, and the Rights Agent shall, if the Company
so directs, supplement or amend this Agreement without the approval of any
holders of Rights Certificates in order to (i) cure any ambiguity, (ii) correct
or supplement any provision contained herein which may be defective or
inconsistent with any other provisions herein, (iii) shorten or lengthen any
time period hereunder, or (iv) change or supplement the provisions hereunder in
any manner which the Company may deem necessary or desirable; provided that no
such supplement or amendment shall adversely affect the interests of the Rights
Agent or the holders of Rights as such (other than an Acquiring Person or an
Affiliate or Associate of an Acquiring Person), and no such amendment may cause
the rights again to become redeemable or cause the Agreement again to become
amendable other than in accordance with this sentence. Notwithstanding anything
contained in this Agreement to the contrary, no supplement or amendment shall be
made which changes the Redemption Price. Upon the delivery of a certificate from
an appropriate officer of the Company which states that the proposed supplement
or amendment is in compliance with the terms of this Section 27, the Rights
Agent shall execute such supplement or amendment. Notwithstanding the foregoing,
any supplement or amendment shall not change or increase the Rights Agent's
duties, liabilities or obligation hereunder, unless consented to by the Rights
Agent in writing and, if reasonably requested by the Rights Agent, only
following receipt of an opinion of counsel in connection therewith.

         Section 28. Successors. All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Rights Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.

         Section 29. Benefits of this Agreement. Nothing in this Agreement shall
be construed to give to any Person other than the Company, the Rights Agent and
the registered holders of the Right Certificates (and, prior to the Distribution
Date, the Common Stock) any legal or equitable right, remedy or claim under this
Agreement; but this Agreement shall be for the sole and exclusive benefit of the
Company, the Rights Agent and the registered holders of the Right Certificates
(and, prior to the Distribution Date, the Common Stock).

         Section 30. Severability. If any term, provision, covenant or
restriction of this Agreement or applicable to this Agreement is held by a court
of competent jurisdiction or other authority to be invalid, void or
unenforceable, the remainder of the terms, provisions, covenants and
restrictions of

                                       35
<PAGE>   39

this Agreement shall remain in full force and effect and shall in no way be
affected, impaired or invalidated.

         Section 31. Governing Law. This Agreement and each Right Certificate
issued hereunder shall be deemed to be a contract made under the laws of the
State of Texas and for all purposes shall be governed by and construed in
accordance with the laws of such State applicable to contracts to be made and
performed entirely within such State; provided, however, that all provisions
regarding the rights, duties and obligations of the Rights Agent shall be
governed by and construed in accordance with the laws of the State of New York
applicable to contracts made and to be performed entirely within such State.

         Section 32. Counterparts. This Agreement may be executed in any number
of counterparts and each of such counterparts shall for all purposes be deemed
to be an original, and all such counterparts shall together constitute but one
and the same instrument.

         Section 33. Descriptive Headings. Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

                                       36
<PAGE>   40

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed and attested, all as of the day and year first above written.

Attest:                                       AMERICAN HOMESTAR
                                              CORPORATION

By /s/ KRISTI E. GROSS                           By /s/ CRAIG A. REYNOLDS
  -----------------------------                 -----------------------------
  Name: Kristi E. Gross                        Name: Craig A. Reynolds
  Title: Assistant Secretary                   Title: Executive Vice President,
                                                      Chief Financial Officer
                                                      and Secretary

Attest:                                       CHASEMELLON SHAREHOLDER
                                              SERVICES, L.L.C.

By /s/ TIM OLIVER                             By /s/ DAVID M. CARY
  -----------------------------                 -----------------------------
  Name: Tim Oliver                             Name: David M. Cary
  Title: Relationship Manager                  Title: Assistant Vice President

                                       37
<PAGE>   41

                                                                       EXHIBIT A

                             STATEMENT OF RESOLUTION
                 ESTABLISHING AND DESIGNATING A SERIES OF SHARES
                                       OF
                          AMERICAN HOMESTAR CORPORATION

                  SERIES B JUNIOR PARTICIPATING PREFERRED STOCK

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

     Pursuant to the provisions of Article 2.13 of the Texas Business
Corporation Act, as amended and pursuant to Article IV of its Articles of
Incorporation, as amended through the date hereof, the undersigned, American
Homestar Corporation, a Texas corporation (the "Company"), hereby submits the
following statement for purposes of establishing and designating a series of
shards and fixing and determining the preferences, limitations and relative
rights thereof:

     I. The name of the Company is American Homestar Corporation.

     II. The following resolution establishing and designating a series of
shares and fixing and determining the preferences, limitations and relative
rights thereof was duly adopted by the Board of Directors of the Company
effective February 10, 2000, which action constitutes all necessary action on
the part of the Company for the adoption thereof:

     RESOLVED, that pursuant to the authority granted to and vested in the Board
of Directors of the Company (hereinafter called the "Board of Directors" or the
"Board") in accordance with the provisions of the Company's Articles of
Incorporation, as amended to date (hereinafter called the "Articles of
Incorporation"), the Board of Directors hereby creates a series of Preferred
Stock, par value $1.00 per share (the "Preferred Stock"), of the Company and
hereby states the designation and number of shares, and fixes the relative
rights, powers and preferences thereof, and the limitations thereof, as follows:

     Section 1. Designation and Amount. The shares of such series shall be
designated as "Series B Junior Participating Preferred Stock" (the "Series B
Preferred Stock") and the number of shares constituting the Series B Preferred
Stock shall be 100,000. Such number of shares may be increased or decreased by
resolution of the Board of Directors; provided, that no decrease shall reduce
the number of shares of Series B Preferred Stock to a number less than the
number of shares then outstanding plus the number of shares reserved for
issuance upon the exercise of outstanding options, rights or warrants or upon
the conversion of any outstanding securities issued by the Company convertible
into Series B Preferred Stock.

                                      A-1
<PAGE>   42

     Section 2. Dividends and Distributions.

     (A) Subject to the rights of the holders of any shares of any series of
Preferred Stock of the Company (the "Preferred Stock") (or any similar stock)
ranking prior and superior to the Series B Preferred Stock with respect to
dividends, the holders of shares of Series B Preferred Stock, in preference to
the holders of Common Stock, par value $.05 per share of the Company (the
"Common Stock") and of any other stock of the Company ranking junior to the
Series B Preferred Stock, shall be entitled to receive, when, as and if declared
by the Board of Directors out of funds legally available for the purpose,
quarterly dividends payable in cash on the last day of January, April, July, and
October in each year (each such date being referred to herein as a "Dividend
Payment Date"), commencing on the first Dividend Payment Date after the first
issuance of a share or fraction of a share of Series B Preferred Stock, in an
amount per share (rounded to the nearest cent) equal to the greater of (a) $1 or
(b) subject to the provision for adjustment hereinafter set forth, 1000 times
the aggregate per share amount of all cash dividends, and 1000 times the
aggregate per share amount (payable in kind) of all non-cash dividends or other
distributions other than a dividend payable in shares of Common Stock, declared
on the Common Stock since the immediately preceding Dividend Payment Date or,
with respect to the first Dividend Payment Date, since the first issuance of any
share or fraction of a share of Series B Preferred Stock. In the event the
Company shall at any time after February 10, 2000, declare or pay any dividend
on the Common Stock payable in shares of Common Stock, or effect a subdivision
or combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the amount to which holders of shares of Series B Preferred Stock were
entitled immediately prior to such event under clause (b) of the preceding
sentence shall be adjusted by multiplying such amount by a fraction, the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

     (B) The Company shall declare a dividend or distribution on the Series B
Preferred Stock as provided in paragraph (A) of this Section immediately after
it declares a dividend or distribution on the Common Stock (other than a
dividend payable in shares of Common Stock); provided that, in the event no
dividend or distribution shall have been declared on the Common Stock during the
period between any Dividend Payment Date and the next subsequent Dividend
Payment Date, a dividend of $1 per share on the Series B Preferred Stock shall
nevertheless be payable, when, as and if declared, on such subsequent Dividend
Payment Date.

     (C) Dividends shall begin to accrue and be cumulative, whether or not
earned or declared, on outstanding shares of Series B Preferred Stock from the
Dividend Payment Date next preceding the date of issue of such shares, unless
the date of issue of such shares is prior to the record date for the first
Dividend Payment Date, in which case dividends on such shares shall begin to
accrue from the date of issue of such shares, or unless the date of issue is a
Dividend Payment Date or is a date

                                      A-2
<PAGE>   43

after the record date for the determination of holders of shares of Series B
Preferred Stock entitled to receive a quarterly dividend and before such
Dividend Payment Date, in either of which events such dividends shall begin to
accrue and be cumulative from such Dividend Payment Date. Accrued but unpaid
dividends shall not bear interest. Dividends paid on the shares of Series B
Preferred Stock in an amount less than the total amount of such dividends at the
time accrued and payable on such shares shall be allocated pro rata on a
share-by-share basis among all such shares at the time outstanding. The Board of
Directors may fix a record date for the determination of holders of shares of
Series B Preferred Stock entitled to receive payment of a dividend or
distribution declared thereon, which record date shall be not more than 50 days
prior to the date fixed for the payment thereof.

     Section 3. Voting Rights. The holders of shares of Series B Preferred Stock
shall have the following voting rights;

     (A) Subject to the provision for adjustment hereinafter set forth and
except as otherwise provided in the Articles of Incorporation or required by
law, each share of Series B Preferred Stock shall entitle the holder thereof to
1000 votes on all matters upon which the holders of the Common Stock of the
Company are entitled to vote. In the event the Company shall at any time after
February 10, 2000, declare or pay any dividend on the Common Stock payable in
shares of Common Stock, or effect a subdivision or combination or consolidation
of the outstanding shares of Common Stock (by reclassification or otherwise than
by payment of a dividend in shares of Common Stock) into a greater or lesser
number of shares of Common Stock, then in each such case the number of votes per
share to which holders of shares of Series B Preferred Stock were entitled
immediately prior to such event shall be adjusted by multiplying such number by
a fraction, the numerator of which is the-number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

     (B) Except as otherwise provided herein, in the Articles of Incorporation
or in any other Certificate of Designations creating a series of Preferred Stock
or any similar stock, and except as otherwise required by law, the holders of
shares of Series B Preferred Stock and the holders of shares of Common Stock and
any other capital stock of the Company having general voting rights shall vote
together as one class on all matters submitted to a vote of stockholders of the
Company.

     (C) Except as set forth herein, or as otherwise provided by law, holders of
Series B Preferred Stock shall have no special voting rights and their consent
shall not be required (except to the extent they are entitled to vote with
holders of Common Stock as set forth herein) for taking any corporate action.

                                      A-3
<PAGE>   44
     Section 4. Certain Restrictions.

     (A) Whenever quarterly dividends or other dividends or distributions
payable on the Series B Preferred Stock as provided in Section 2 are in arrears,
thereafter and until all accrued and unpaid dividends and distributions, whether
or not earned or declared, on shares of Series B Preferred Stock outstanding
shall have been paid in full, the Company shall not:

          (i) declare or pay dividends, or make any other distributions, on any
     shares of stock ranking junior (as to dividends) to the Series B Preferred
     Stock;

          (ii) declare or pay dividends, or make any other distributions, on any
     shares of stock ranking on a parity (as to dividends) with the Series B
     Preferred Stock, except dividends paid ratably on the Series B Preferred
     Stock and all such parity stock on which dividends are payable or in
     arrears in proportion to the total amounts to which the holders of all such
     shares are then entitled;

          (iii) redeem or purchase or otherwise acquire for consideration shares
     of any stock ranking junior (either as to dividends or upon liquidation,
     dissolution or winding up) to the Series B Preferred Stock, provided that
     the Company may at any time redeem, purchase or otherwise acquire shares of
     any such junior stock in exchange for shares of any stock of the Company
     ranking junior (as to dividends and upon dissolution, liquidation or
     winding up) to the Series B Preferred Stock or rights, warrants or options
     to acquire such junior stock;

          (iv) redeem or purchase or otherwise acquire for consideration any
     shares of Series B Preferred Stock, or any shares of stock ranking on a
     parity (either as to dividends or upon liquidation, dissolution or winding
     up) with the Series B Preferred Stock, except in accordance with a purchase
     offer made in writing or by publication (as determined by the Board of
     Directors) to all holders of such shares upon such terms as the Board of
     Directors, after consideration of the respective annual dividend rates and
     other relative rights and preferences of the respective series and classes,
     shall determine in good faith will result in fair and equitable treatment
     among the respective series or classes.

     (B) The Company shall not permit any subsidiary of the Company to purchase
or otherwise acquire for consideration any shares of stock of the Company unless
the Company could, under paragraph (A) of this Section 4, purchase or otherwise
acquire such shares at such time and in such manner.

     Section 5. Reacquired Shares. Any shares of Series B Preferred Stock
purchased or otherwise acquired by the Company in any manner whatsoever shall be
retired and canceled promptly after the acquisition thereof.

     Section 6. Liquidation, Dissolution or Winding Up. Upon any liquidation,
dissolution or winding up of the Company, no distribution shall be made (A) to
the holders of the Common

                                      A-4
<PAGE>   45

Stock or of shares of any other stock of the Company ranking junior, upon
liquidation, dissolution or winding up, to the Series B Preferred Stock unless,
prior thereto, the holders of shares of Series B Preferred Stock shall have
received $100 per share, plus an amount equal to accrued and unpaid dividends
and distributions thereon, whether or not earned or declared, to the date of
such payment, provided that the holders of shares of Series B Preferred Stock
shall be entitled to receive an aggregate amount per share, subject to the
provision for adjustment hereinafter set forth, equal to 1000 times the
aggregate amount to be distributed per share to holders of shares of Common
Stock, or (B) to the holders of shares of stock ranking on a parity upon
liquidation, dissolution or winding up with the Series B Preferred Stock, except
distributions made ratably on the Series B Preferred Stock and all such parity
stock in proportion to the total amounts to which the holders of all such shares
are entitled upon such liquidation, dissolution or winding up. In the event the
Company shall at any time after February 10, 2000 declare or pay any dividend on
the Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the aggregate amount to which holders of shares of Series B Preferred
Stock were entitled immediately prior to such event under the proviso in clause
(A) of the preceding sentence shall be adjusted by multiplying such amount by a
fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

     Section 7. Consolidation, Merger, etc. In case the Company shall enter into
any consolidation, merger, combination or other transaction in which the shares
of Common Stock are converted into, exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case each share of
Series B Preferred Stock shall at the same time be similarly converted into,
exchanged for or changed into an amount per share (subject to the provision for
adjustment hereinafter set forth) equal to 1000 times the aggregate amount of
stock, securities, cash and/or any other property (payable in kind), as the case
may be, into which or for which each share of Common Stock is converted,
exchanged or converted. In the event the Company shall at any time after
February 10, 2000 declare or pay any dividend on the Common Stock payable in
shares of Common Stock, or effect a subdivision or combination or consolidation
of the outstanding shares of Common Stock (by reclassification or otherwise than
by payment of a dividend in shares of Common Stock) into a greater or lesser
number of shares of Common Stock, then in each such case the amount set forth in
the preceding sentence with respect to the conversion, exchange or change of
shares of Series B Preferred Stock shall be adjusted by multiplying such amount
by a fraction, the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

     Section 8. No Redemption. The shares of Series B Preferred Stock shall not
be redeemable from any holder.

                                      A-5
<PAGE>   46

     Section 9. Rank. The Series B Preferred Stock shall rank, with respect to
the payment of dividends and the distribution of assets upon liquidation,
dissolution or winding up of the Company, junior to all other series of
Preferred Stock and senior to the Common Stock.

     Section 10. Amendment. if any proposed amendment to the Articles of
Incorporation (including this Certificate of Designations) would alter, change
or repeal any of the preferences, powers or special rights given to the Series B
Preferred Stock so as to affect the Series B Preferred Stock adversely, then the
holders of the Series B Preferred Stock shall be entitled to vote separately as
a class upon such amendment, and the affirmative vote of two-thirds of the
outstanding shares of the Series B Preferred Stock, voting separately as a
class, shall be necessary for the adoption thereof, in addition to such other
vote as may be required by the Business Corporation Act of the State of Texas.

     IN WITNESS WHEREOF, this Statement of Resolution is executed on behalf of
the Company by its President and attested-by its Assistant Secretary this _____
day of February, 2000.

                                                  -----------------------------
                                                  Laurence A. Dawson, Jr.,
                                                  President

Attest:

---------------------------
Kristi E. Gross,
Assistant Secretary

                                      A-6
<PAGE>   47

                                                                     EXHIBIT B

                            Form of Right Certificate

Certificate No. R                                                       Rights
                 -----                                             -----

       NOT EXERCISABLE AFTER FEBRUARY 9, 2010 OR EARLIER IF REDEMPTION OR
       EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER
       RIGHT AND TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.
       UNDER CERTAIN CIRCUMSTANCES, AS SET FORTH IN THE RIGHTS AGREEMENT,
       RIGHTS OWNED BY OR TRANSFERRED TO ANY PERSON WHO BECOMES AN ACQUIRING
       PERSON (AS DEFINED IN THE RIGHTS AGREEMENT) AND CERTAIN TRANSFEREES
       THEREOF WILL BECOME NULL AND VOID AND WILL NO LONGER BE TRANSFERABLE.

                                Right Certificate

                          AMERICAN HOMESTAR CORPORATION

     This certifies that ___________ or registered assigns, is the registered
owner of the number of Rights set forth above, each of which entitles the owner
thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of February 10, 2000, as the same may be amended from time
to time (the "Rights Agreement"), between American Homestar Corporation, a Texas
corporation (the "Company"), and ChaseMellon Shareholder Services, L.L.C., a New
Jersey limited liability company, (the "Rights Agent"), to purchase from the
Company at any time after the Distribution Date (as such term is defined in the
Rights Agreement) and prior to 5:00 P.M., New York City time, on February 9,
2010 at the office or agency of the Rights Agent designated for such purpose, or
of its successor as Rights Agent, one one-thousandth of a fully paid
non-assessable share of Series B Junior Participating Preferred Stock, par value
$1.00 per share (the "Preferred Stock"), of the Company, at a purchase price of
$30.00 per one one-thousandth of a share of Preferred Stock (the "Purchase
Price"), upon presentation and surrender of this Right Certificate with the Form
of Election to Purchase duly executed. The number of Rights evidenced by this
Rights Certificate (and the number of one one-thousandths of a share of
Preferred Stock which may be purchased upon exercise hereof) set forth above,
and the Purchase Price set forth above, are the number and Purchase Price as of
February 10, 2000, based on the Preferred Stock as constituted at such date. As
provided in the Rights Agreement, the Purchase Price, the number of one
one-thousandths of a share of Preferred Stock (or other securities or property)
which may be purchased upon the exercise of the Rights and the number of Rights
evidenced by this Right Certificate are subject to modification and adjustment
upon the happening of certain events.

                                      B-1
<PAGE>   48

     This Right Certificate is subject to all of the terms, covenants and
restrictions of the Rights Agreement, which terms, covenants and restrictions
are hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Right Certificates. Copies of
the Rights Agreement are on file at the principal executive offices of the
Company and the above-mentioned office or agency of the Rights Agent. The
Company will mail to the holder of this Right Certificate a copy of the Rights
Agreement without charge after receipt of a written request therefor.

     This Right Certificate, with or without other Right Certificates, upon
surrender at the office or agency of the Rights Agent designated for such
purpose, may be exchanged for another Right Certificate or Right Certificates of
like tenor and date evidencing Rights entitling the holder to purchase a like
aggregate number of shares of Preferred Stock as the Rights evidenced by the
Right Certificate or Right Certificates surrendered shall have entitled such
holder to purchase. If this Right Certificate shall be exercised in part, the
holder shall be entitled to receive upon surrender hereof another Right
Certificate or Right Certificates for the number of whole Rights not exercised.

     Subject to the provisions of the Rights Agreement, the Rights evidenced by
this Certificate (i) may be redeemed by the Company at a redemption price of
$.01 per Right or (ii) may be exchanged in whole or in part for shares of
Preferred Stock or shares of the Company's Common Stock, par value $.05 per
share.

     No fractional shares of Preferred Stock will be issued upon the exercise of
any Right or Rights evidenced hereby (other than fractions which are integral
multiples of one one-thousandth of a share of Preferred Stock, which may, at the
election of the Company, be evidenced by depositary receipts), but in lieu
thereof a cash payment will be made, as provided in the Rights Agreement.

     No holder of this Right Certificate, as such, shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred Stock
or of any other securities of the Company which may at any time be issuable on
the exercise hereof, nor shall anything contained in the Rights Agreement or
herein be construed to confer upon the holder hereof, as such, any of the rights
of a stockholder of the Company or any right to vote for the election of
directors or upon any matter submitted to stockholders at any meeting thereof,
or to give or withhold consent to any corporate action, or to receive notice of
meetings or other actions affecting stockholders (except as provided in the
Rights Agreement) or to receive dividends or subscription rights, or otherwise,
until the Right or Rights evidenced by this Right certificate shall have been
exercised as provided in the Rights Agreement.

     This Right Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent

                                      B-2
<PAGE>   49

     WITNESS the facsimile signature of the proper officers of the Company and
its corporate seal. Dated as of          .
                               ----------

ATTEST:                                               AMERICAN HOMESTAR
                                                      CORPORATION

By    CHASEMELLON SHAREHOLDER                         By----------------------
      SERVICES, L.L.C.

Countersigned:

-----------------------------
as Rights Agent

By
  ---------------------------
    Authorized Signature

                                      B-3
<PAGE>   50

                    Form of Reverse Side of Right Certificate

                               FORM OF ASSIGNMENT

          (To be executed by the registered holder if such holder desires to
          transfer the Right Certificate)

          FOR VALUE RECEIVED _______________________________ hereby sells,
     assigns and transfer unto ______________________________________

     _________________________________________________________________________
                 (Please print name and address of transferee)

     _________________________________________________________________________

     Rights represented by this Right Certificate, together with all right,
     title and interest therein, and does hereby irrevocably constitute and
     appoint Attorney, to transfer said Rights on the books of the within-named
     Company, with full power of substitution.

     Dated:
           ---------------------

                                                          ---------------------
                                                          Signature

     Signature Guaranteed:

     Signatures must be guaranteed by a member firm of a registered national
     securities exchange, a member of the National Association of Securities
     Dealers, Inc., or a commercial bank or trust company having an office or
     correspondent in the United States.

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

                                (To be completed)

          The undersigned hereby certifies that the Rights evidenced by this
     Right Certificate are not Beneficially Owned by, were not acquired by the
     undersigned from, and are not being assigned to, an Acquiring Person or an
     Affiliate or Associate thereof (as defined in the Rights Agreement).

                                                          ---------------------
                                                          Signature

                                      B-4
<PAGE>   51

Form of Reverse Side of Right Certificate - continued

                          FORM OF ELECTION TO PURCHASE

     (To be executed if holder desires to exercise Rights represented by the
     Rights Certificate)

To AMERICAN HOMESTAR CORPORATION

     The undersigned hereby irrevocably elects to exercise--------------------
Rights represented by this Right Certificate to purchase the shares of Preferred
Stock (or other securities or property) issuable upon the exercise of such
Rights and requests that certificates for such shares of Preferred Stock (or
such other securities) be issued in the name of:

--------------------------------------------------------------------------------
                         (Please print name and address)

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

If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivery to:

Please insert social security or other identifying number

--------------------------------------------------------------------------------
                         (Please print name and address)

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

Dated:---------------------

                                                          ---------------------
                                                          Signature

(Signature must conform to holder specified on Right Certificate)

Signature Guaranteed:

                                      B-5
<PAGE>   52

     Signature must be guaranteed by a member of firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.

                                      B-6
<PAGE>   53

             Form of Reverse Side of Right Certificate -- continued

--------------------------------------------------------------------------------
                                (To be completed)

     The undersigned certifies that the Rights evidenced by this Right
Certificate are not Beneficially Owned by, and were not acquired by the
undersigned from, an Acquiring Person or an Affiliate or Associate thereof (as
defined in the Rights Agreement)

                                                          ---------------------
                                                          Signature

--------------------------------------------------------------------------------
                                     NOTICE

     The signature in the Form of Assignment or Form of Election to Purchase, as
the case may be, must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

     In the event the certification set forth above in the Form of Assignment or
the Form of Election to Purchase, as the case may be, is not completed, such
Assignment or Election to Purchase will not be honored.

                                      B-7
<PAGE>   54

                                                                     EXHIBIT C

      UNDER CERTAIN CIRCUMSTANCES, AS SET FORTH IN THE RIGHTS AGREEMENT,
      RIGHTS OWNED BY OR TRANSFERRED TO ANY PERSON WHO BECOMES AN ACQUIRING
      PERSON (AS DEFINED IN THE RIGHTS AGREEMENT) AND CERTAIN TRANSFEREES
      THEREOF WILL BECOME NULL AND VOID AND WILL NO LONGER BE TRANSFERABLE.

                          SUMMARY OF RIGHTS TO PURCHASE
                            Shares of Preferred Stock

     Effective February 10, 2000, the Board of Directors of American Homestar
Corporation (the "Company") declared a dividend of one preferred share purchase
right (a "Right") for each outstanding share of common stock, par value $.05 per
share, of the Company (the "Common Stock"). The dividend is payable on February
10, 2000 (the "Record Date") to the stockholders of record on that date. Each
Right entitles the registered holder to purchase from the Company one
one-thousandth of a share of Series B Junior Participating Preferred Stock, par
value $1.00 per share (the "Preferred Stock"), of the Company at a price of
$30.00 per one one-thousandth of a share of Preferred Stock (the "Purchase
Price"), subject to adjustment. The description and terms of the Rights are set
forth in a Rights Agreement dated as of February 10, 2000, as the same may be
amended from time to time (the "Rights Agreement"), between the Company and
ChaseMellon Shareholder Services, L.L.C., as Rights Agent (the "Rights Agent").

     Until the earlier to occur of (i) 10 days following a public announcement
that a person or group of affiliated or associated persons (an "Acquiring
Person") have acquired beneficial ownership of 15% or more of the outstanding
shares of Common Stock or (ii) 10 business days (or such later date as may be
determined by action of the Board of Directors prior to such time as any person
or group of affiliated persons becomes an Acquiring Person) following the
commencement of, or announcement of an intention to make, a tender offer or
exchange offer the consummation of which would result in the beneficial
ownership by a person or group of 15% or more of the outstanding shares of
Common Stock (the earlier of such dates being called the "Distribution Date"),
the Rights will be evidenced, with respect to any of the Common Stock
certificates outstanding as of the Record Date, by such Common Stock certificate
together with a copy of this Summary of Rights. The term Acquiring Person
excludes the Company, its subsidiaries, its benefit plans, such plans' trustees,
as well as the Company's co-Chief Executive Officers, Laurence A. Dawson, Jr.
and Finis F. Teeter, their affiliates, associates and family members.

     The Rights Agreement provides that, until the Distribution Date (or earlier
redemption or expiration of the Rights), the Rights will be transferred with and
only with the Common Stock. Until the Distribution Date (or earlier redemption
or expiration of the Rights), new Common Stock certificates issued after the
Record Date upon transfer or new issuances of Common Stock will

                                      C-1
<PAGE>   55

contain a notation incorporating the Rights Agreement by reference. Until the
Distribution Date (or earlier redemption or expiration of the Rights), the
surrender for transfer of any certificates for shares of Common Stock
outstanding as of the Record Date, even without such notation or a copy of this
Summary of Rights, will also constitute the transfer of the Rights associated
with the shares of Common Stock represented by such certificate. As soon as
practicable following the Distribution Date, separate certificates evidencing
the Rights ("Right Certificates") will be mailed to holders of record of the
Common Stock as of the close of business on the Distribution Date and such
separate Right Certificates alone will evidence the Rights.

     The Rights are not exercisable until the Distribution Date. The Rights will
expire on February 9, 2010 (the "Final Expiration Date"), unless the Final
Expiration Date is extended or unless the Rights are earlier redeemed or
exchanged by the Company, in each case as described below.

     The Purchase Price payable, and the number of shares of Preferred Stock or
other securities or property issuable, upon exercise of the Rights are subject
to adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Stock, (ii) upon the grant to holders of the Preferred Stock of certain rights
or warrants to subscribe for or purchase Preferred Stock at a price, or
securities convertible into Preferred Stock with a conversion price, less than
the then current market price of the Preferred Stock or (iii) upon the
distribution to holders of the Preferred Stock of evidences of indebtedness or
assets (excluding regular periodic cash dividends or dividends payable in
Preferred Stock) or of subscription rights or warrants (other than those
referred to above).

     The number of outstanding Rights are also subject to adjustment in the
event of a stock split of the Common Stock or a stock dividend on the Common
Stock payable in shares of Common Stock or subdivisions, consolidations or
combinations of the Common Stock occurring, in any such case, prior to the
Distribution Date.

     Shares of Preferred Stock purchasable upon exercise of the Rights will not
be redeemable. Each share of Preferred Stock will be entitled, when, as and if
declared, to a minimum preferential quarterly dividend payment of $1 per share
but will be entitled to an aggregate dividend of 1000 times the dividend
declared per share of Common Stock. In the event of liquidation, the holders of
the Preferred Stock will be entitled to a minimum preferential liquidation
payment of $100 per share (plus any accrued but unpaid dividends) but will be
entitled to an aggregate payment of 1000 times the payment made per share of
Common Stock. Each share of Preferred Stock will have 1000 votes, voting
together with the Common Stock. Finally, in the event of any merger,
consolidation or other transaction in which shares of Common Stock are converted
or exchanged, each share of Preferred Stock will be entitled to receive 1000
times the amount received per share of Common Stock. These rights are protected
by customary antidilution provisions.

                                      C-2
<PAGE>   56

     Because of the nature of the Preferred Stock's dividend, liquidation and
voting rights, the value of the one one-thousandth interest in a share of
Preferred Stock purchasable upon exercise of each Right should approximate the
value of one share of Common Stock.

     In the event that any person or group of affiliated or associated persons
becomes an Acquiring Person, each holder of a Right, other than Rights
Beneficially Owned by the Acquiring Person (which will thereupon become null and
void), will thereafter have the right to receive upon exercise of a Right at the
then current exercise price of the Right, that number of shares of Common Stock
having a market value of two times the exercise price of the Right.

     In the event that, after a person or group has become an Acquiring Person,
the Company is acquired in a merger or other business combination transaction or
50% or more of its consolidated assets or earning power are sold, proper
provision will be made so that each holder of a Right (other than Rights
Beneficially Owned by an Acquiring Person which will have become null and void)
will thereafter have the right to receive, upon the exercise thereof at the then
current exercise price of the Right, that number of shares of common stock of
the person with whom the Company has engaged in the foregoing transaction (or
its parent), which number of shares at the time of such transaction will have a
market value of two times the exercise price of the Right.

     At any time after any person or group becomes an Acquiring Person and prior
to the acquisition by such person or group of 50% or more of the outstanding
shares of Common Stock or the occurrence of an event described in the prior
paragraph, the Board of Directors of the Company may exchange the Rights (other
than Rights owned by such person or group which will have become null and void),
in whole or in part, at an exchange ratio of one share of Common Stock, or one
one-thousandth of a share of Preferred Stock (or of a share of a class or series
of the Company's preferred stock having equivalent rights, preferences and
privileges), per Right (subject to adjustment).

     With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional shares of Preferred Stock will be issued
(other than fractions which are integral multiples of one one-thousandth of a
share of Preferred Stock, which may, at the election of the Company, be
evidenced by depositary receipts) and in lieu thereof, an adjustment in cash
will be made based on the market price of the Preferred Stock on the last
trading day prior to the date of exercise.

     At any time prior to the time an Acquiring Person becomes such, the Board
of Directors of the Company may redeem the Rights in whole, but not in part, at
a price of $.01 per Right (the "Redemption Price"). The redemption of the Rights
may be made effective at such time, on such basis and with such conditions as
the Board of Directors in its sole discretion may establish. Immediately upon
any redemption of the Rights, the right to exercise the Rights will terminate
and the only right of the holders of Rights will be to receive the Redemption
Price.

                                      C-3
<PAGE>   57

     For so long as the Rights are then redeemable, the Company may, except with
respect to the redemption price, amend the Rights in any manner. After the
Rights are no longer redeemable, the Company may, except with respect to the
Redemption Price, amend the Rights in any manner that does not adversely affect
the interests of holders of the Rights.

     Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

     A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A. A
copy of the Rights Agreement is available free of charge from the Company. This
summary description of the Rights does not purport to be complete and is
qualified in its entirety by reference to the Rights Agreement, as the same may
be amended from time to time, which is hereby incorporated herein by reference.

                                      C-4

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