Document:

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                                                                   Exhibit 10.20

                     AMENDED AND RESTATED PROMISSORY NOTE
                     ------------------------------------

$412,333.00                                                  Annandale, Virginia
                                                               February 24, 2000

  FOR VALUE RECEIVED, Frederick C. Hawkins, III (the "Maker"), hereby promises
to pay to OneSoft Corporation, a Delaware corporation (the "Lender"), the
principal sum of Four Hundred Twelve Thousand Three Hundred Thirty-three Dollars
($412,333.00), with interest, at the rate hereinafter set forth, from December
1, 1997 until payment in full of all principal and interest hereunder.  All
payments of principal and interest shall be made in lawful currency of the
United States of America in immediately available funds at such address as the
Lender may from time to time designate.

  1.  Interest.  Interest on all unpaid principal and due but unpaid interest
      --------
shall accrue at the  rate of 6.10 percent per annum on a self-amortizing basis.
Payment of accrued interest shall be made upon demand of the principal amount
hereunder.

  2.  Principal.  All unpaid principal and accrued interest shall be payable on
      ---------
demand on or after the first to occur of (i) December 1, 2002; (ii) the sale of
substantially all of the assets of the Lender where cash proceeds to the Maker
are equal to or greater than the then-outstanding principal and accrued
interest; or (iii) a sale of all of the Collateral pledged as security for the
payment of this Note pursuant to and defined in a certain Stock Pledge Agreement
of even date herewith.

  3.  Prepayment.  This Note may be prepaid in whole or in part by the Maker
      ----------
without penalty at any time. Unpaid principal and accrued interest shall be
payable, without demand, on a pro rata basis at any time the Maker sells a
portion of the Collateral pledged as security for the payment of this Note
pursuant to the Stock Pledge Agreement. At any time the Maker sells a portion of
the shares which he owns of the Lender's common stock, other than the
Collateral, after setting aside sufficient funds to pay all tax liabilities
resulting from each such sale (i) if the net, after tax proceeds from each such
sale are less than one-half of the outstanding principal plus accrued interest
to the date first above written (the "Current Outstanding Balance"), all such
proceeds shall be payable, without demand, to the Lender; (ii) if the net, after
tax proceeds from each such sale are equal to or greater than one-half of the
Current Outstanding Balance, one-half of the Current Outstanding Balance shall
be payable, without demand, to the Lender with the remaining proceeds going to
the Maker; and (iii) once the Maker has received any proceeds from any such
sale, thereafter all such net, after tax proceeds shall be payable, without
demand, to the Lender until the Note is prepaid in full. Any prepayments to the
Lender shall be applied first to accrued but unpaid interest and then to
principal. At the option of Maker, this Note may be prepaid in whole or in part
by Maker's assignment to the Lender of such portion of the Collateral equal to
the then-outstanding principal and accrued interest. Any prepayments by the
Maker shall be applied first against the 50% of the Current Outstanding Balance
to which the Payee has recourse against the Maker and then against the remainder
of the Note.

  4.  Default.  Upon the occurrence of (a) any failure of the Maker to repay the
      -------
obligations hereunder, or (b) the insolvency, dissolution, appointment of a
receiver for any part of the property of, assignment for the benefit of
creditors by, or the commencement of any proceedings under any bankruptcy or
insolvency laws by or against the Maker, Lender's recourse against Maker with
respect to any amount due hereunder shall be limited (i) to the Collateral for
this Promissory Note pursuant to and defined in that certain Stock Pledge
Agreement of even date herewith and (ii) personally to fifty percent (50%) of
the Current Outstanding Balance.

  5.  Waivers.  The Maker hereby (i) waives notice of and consents to any and
      -------
all advances, settlements, compromises and indulgences, including any extension
or postponement of the time for
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payment and any and all additions, substitutions and releases of any person
primarily or secondarily liable, (ii) waives presentment, demand, notice,
protest and all other demands, notices and suretyship defenses generally, in
connection with the delivery, acceptance, performance, default or enforcement of
or under this Note and (iii) agrees to pay all costs and expenses, including
reasonable attorneys' fees, incurred or paid by the Lender in enforcing this
Note on default.

  6.  Governing Law.  This Note shall be governed by and construed in accordance
      -------------
with the law of The Commonwealth of  Virginia without giving effect to the
conflict of law principles thereof.

              THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK

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IN WITNESS WHEREOF, the Maker has caused this Amended and Restated Note to be
executed as an instrument under seal as of the date first above written.

                                        /s/ Frederick C. Hawkins, III
                                        ----------------------------------------
                                        Frederick C. Hawkins, III

                                       3
<PAGE>

                  AMENDED AND RESTATED STOCK PLEDGE AGREEMENT
                  -------------------------------------------

  This Amended and Restated Stock Pledge Agreement (this "Agreement") dated as
of February 24, 2000 is made by and between Fredrick C. Hawkins, III (the
"Pledgor") and OneSoft Corporation, a Delaware corporation (the "Pledgee").

  WHEREAS, the Pledgor acquired 750,000 of the issued and outstanding shares of
the common stock (the "Robertson Shares") of the Pledgee from William L.
Robertson pursuant to that certain Agreement and Assignment dated as of November
14, 1997 (the "Robertson Shares Agreement"); and

  WHEREAS, the Pledgee agreed to accept payment for the Robertson Shares in the
form of a Note from the Pledgor in the original principal amount of $412,333.00
(the "Note") and the Pledgor agreed to grant a security interest to the Pledgee
in the Shares purchased by the Pledgor, along with certain other collateral; and

  WHEREAS, the Pledgee has agreed to accept a substitute for the security
interest and to release and return to the Pledgor that portion of the Shares and
that certain other collateral which will no longer serve as a security interest,
and to enter into this Agreement.

  NOW, THEREFORE, in consideration of the premises and mutual covenants
contained herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

  1.  Grant of Security Interest.  As collateral security for the prompt and
      --------------------------
complete payment, performance and observance of all obligations of the Pledgor
under the Note (the "Obligations"), the Pledgor hereby delivers and pledges to
the Pledgee and grants to the Pledgee a first security interest in and lien on
the following property (the "Collateral"):

        (a)  100,000 shares of the Common Stock of the Pledgee and the
certificates representing same as described in Schedule A attached hereto (the
"Pledged Securities"); and

        (b)  All dividends, interest, distributions, accessions, additions and
substitutions for, to or on the Pledged Securities, other than cash
dividends.

  2.  Delivery of Certificates and Instruments. The Pledgor shall deliver to the
      ----------------------------------------
Pledgee the original certificates representing the Pledged Securities and the
Pledgee shall release and return to the Pledgor the original certificates
representing the Shares along with that certain other collateral concurrently
with the execution and delivery of this Agreement.  All stock certificates
representing the Collateral shall be accompanied by stock powers duly executed
in blank by the Pledgor.  The Pledgee shall register the modification of the
pledge effected hereby on its stock register and corporate records.

  3.  Holding and Care of the Collateral.  The Pledgee shall hold the stock
      ----------------------------------
certificates as security for the Obligations and shall not encumber, dispose of,
or release the Collateral except in accordance with the terms and provisions of
this Agreement.  The Pledgee shall have no duty to the Pledgor with respect to
the Collateral other than the duty to use reasonable care in the safe custody
<PAGE>

of the Collateral in its possession. Without limiting the generality of the
foregoing, the Pledgee, although it may do so at its option, shall be under no
obligation to the Pledgor to take any steps necessary to preserve rights in the
Collateral against other parties.

  4.  Representations, Warranties and Covenants.  The Pledgor hereby represents
      -----------------------------------------
and warrants to the Pledgee that:

        (a)  The Pledged Securities hereafter delivered to the Pledgee will be
owned by the Pledgor free and clear of all claims, liens and encumbrances of
every nature whatsoever, except in favor of the Pledgee;

        (b)  For so long as the Pledgor shall be the record owner of the
Collateral, the Pledgor shall pay all taxes, assessments and other charges which
may be levied or assessed against the Collateral from time to time;

        (c)  The Pledgor shall defend the Collateral against any and all claims
and demands of all third parties;

        (d)  The Pledgor shall provide to the Pledgee such assurances as may be
required by the Pledgee to establish, preserve, perfect and protect the
Pledgee's first and priority security interest in the Collateral, including
without limitation, the execution and delivery of Uniform Commercial Code
Financing Statements reflecting the pledge and security interest granted hereby;

        (e)  The Pledgor will not directly or indirectly assign, pledge or
otherwise encumber the Collateral or any interest therein; and

        (f)  The execution, delivery, performance validity and enforceability of
this Agreement requires no consent, license, permit, approval or authorization
of, exemption by, notice or report to, or registration, filing or declaration
with, any governmental instrumentality.

  5.  Voting Rights of the Pledgor and Certain Payments Absent Default.
      ----------------------------------------------------------------
Provided that no Event of Default (as defined in the Note) shall have occurred
and be continuing, for so long as the Pledgor shall be the record owner of the
Collateral, the Pledgor shall be entitled (a) to the extent permitted by
applicable law and the Articles of Organization and By-Laws of the Company, as
amended and restated, to exercise voting power with respect to the Collateral,
provided, however, that in no event shall the Pledgor exercise such voting power
in any manner contrary to or inconsistent with the terms hereof or with the
terms of the Note or the Amended and Restated Stockholders' and Voting Agreement
dated January 6, 1997 to which the Robertson Shares are subject, and (b) to
receive and retain for the Pledgor's own account any and all dividends (other
than stock or liquidating dividends) and interest from time to time declared or
paid upon any of the Collateral.

  6.  Distribution on Liquidation; Stock Dividends, Etc.  Upon the dissolution,
      --------------------------------------------------
winding up, liquidation or reorganization of the Company, whether in bankruptcy,
insolvency or receivership proceedings, or upon an assignment for the benefit of
creditors or otherwise, any sum to be paid or any property to be distributed
upon or with respect to the Collateral shall be paid over to the Pledgee to be
held by it as collateral security for the Obligations.  In the event that any
stock

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dividend shall be declared on any of the Collateral, or any shares of stock or
fractions thereof shall be issued pursuant to any stock split involving any of
the Collateral, or any distribution of capital shall be made on any of the
Collateral, or any property of any kind shall be distributed upon or with
respect to any of the Collateral pursuant to any recapitalization,
reclassification, merger, consolidation, or reorganization of the capital of the
issuing corporation, the shares or other property so distributed shall be
delivered to the Pledgee, to be held by the Pledgee as part of the Collateral.

  7.  Dividends, Voting Rights, Etc. on Default.  If an Event of Default shall
      ------------------------------------------
occur and be continuing, the Pledgee, for so long as said Event of Default shall
continue to exist, shall be entitled to receive and retain as collateral
security for the Obligations any and all dividends and other distributions from
time to time declared upon or paid with respect to any of the Collateral and to
exercise any and all voting rights and all rights of payment, conversion,
exchange, subscription or any other rights, privileges or options pertaining to
the Collateral as if the Pledgee were the absolute owner thereof, including,
without limitation, the right to exchange, at the discretion of the Pledgee any
and all of the Collateral upon any merger, consolidation, reorganization,
recapitalization or other readjustment of the issuing corporation, and, upon the
exercise of any such right, privilege or option pertaining to the Collateral, to
deposit and deliver any and all of the Collateral with any committee,
depositary, transfer agent, registrar or other designated agency upon such terms
and conditions as the Pledgee may determine, all without liability except to
account for property actually received by the Pledgee, provided, however, that
the Pledgee shall have no duty to the Pledgor to exercise any of the aforesaid
rights, privileges or options and shall not be responsible for any failure or
delay with respect to the exercise of any such rights, privileges or options.

  8.  Application of Cash Collateral.  Any cash received and retained by the
      ------------------------------
Pledgee as additional Collateral pursuant to the foregoing provisions may at any
time and from time to time while an Event of Default shall have occurred and be
continuing be applied (in whole or in part) by the Pledgee, at the Pledgee's
option, to the payment of interest on and/or principal of the Note.

  9.  Remedies Upon Default.  Upon the occurrence and during the continuation of
      ---------------------
any Event of Default, the Pledgee shall be entitled to all the rights and
remedies of a creditor contained in the Uniform Commercial Code of The
Commonwealth of Virginia (the "UCC").

  10. Power of Attorney.  Effective upon the occurrence and during the
      -----------------
continuation of an Event of Default, the Pledgor hereby irrevocably appoints the
Pledgee as the Pledgor's attorney-in-fact for the purpose of carrying out this
Agreement and taking any action and executing any instrument which the Pledgee
may deem reasonably necessary or advisable to accomplish the purposes hereof.
Without limiting the generality of the foregoing, effective upon the occurrence
and during the continuation of an Event of Default, the Pledgee shall have the
right and power to (i) receive, endorse and collect all checks and other orders
for the payment of money made payable to the Pledgor representing any interest
or dividend or other distribution in respect of the Collateral or any part
thereof and to give full discharge for the same and (ii) to execute all
endorsements, assignments or other instruments or conveyance or transfer with
respect to all or any of the Collateral.  The power of attorney granted
hereunder is coupled with an interest and is irrevocable until all the
Obligations shall have been finally and irrevocably satisfied and paid in full.

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<PAGE>

  11. Payment of Taxes, Charges, Etc.  The Pledgee, at its option, may
      ------------------------------
discharge any taxes, charges, assessments, security interests, liens or other
encumbrances upon the Collateral.  All such expenditures incurred by the Pledgee
shall become payable by the Pledgor to the Pledgee upon demand, shall bear
interest at a rate of eight percent (8%) per annum from the date incurred to the
date of payment, and shall become part of the Obligations secured by the
Collateral.

  12. Waivers by Pledgor.  The Pledgor hereby waives presentment, notice of
      ------------------
dishonor and protest of all instruments included in, or evidencing, any
obligations of the Pledgor to the Pledgee or the Collateral and all other
demands and notices of every kind in connection with this Agreement, the
Collateral or the Obligations.

  13. Release of Collateral.  Upon the irrevocable payment in full in cash
      ---------------------
of all of the Obligations, the Pledgor shall be entitled to the return of all
Collateral hereunder which has not been either previously returned or used or
applied to the payment of the Obligations.

  14. Rights, Amendments and Waivers.  No course of dealing between the Pledgor
      ------------------------------
and the Pledgee, nor any delay in exercising, on the part of the Pledgee, any
right, power or privilege hereunder, shall operate as a waiver thereof.  No
single or partial exercise of any right, power or privilege hereunder shall
preclude any other or further exercise thereof or the exercise of any other
right, power or privilege.  The Pledgee may exercise its rights with respect to
the Collateral without resorting or regard to other sources of reimbursement for
the Obligations. No amendment, modification, consent or waiver of any provision
of this Agreement or of any of the rights of the Pledgee hereunder or with
respect to the Obligations or the Collateral shall be effective unless in a
writing executed by the Pledgee, and then such amendment, modification, consent
or waiver shall be effective only in the specific instance and for the purpose
for which given.

  15. Governing Law.  This Agreement shall be governed by and construed in
      -------------
accordance with the law of The Commonwealth of Virginia without giving effect to
the conflict of laws principles thereof.

  16. Severability.  If any provision of this Agreement shall be held by any
      ------------
court of competent jurisdiction to be unenforceable, such holding shall not
affect or impair any other provision hereof.

  17. Benefit of Agreement; Assignment.  This Agreement shall inure to the
      --------------------------------
benefit of the Pledgee and the Pledgee's successors, heirs, executors,
administrators and assigns and shall be binding upon the Pledgor and Pledgor's
heirs, executors, administrators, other legal representatives, successors and
permitted assigns.  The parties hereto may not assign their rights and
obligations under this Agreement without the prior written consent of the other
parties hereto.

  18. Headings and Captions.  The headings and captions of the sections of this
      ---------------------
Agreement are for convenience only and shall in no way affect the meaning or
construction of any provision hereof.

  19. Counterparts.  This Agreement may be executed in any number of
      ------------
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

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<PAGE>

  IN WITNESS WHEREOF, the parties hereto have executed this Agreement as an
instrument under seal as of the date first above written

PLEDGOR                                        PLEDGEE

/s/ Fredrick C. Hawkins, III
---------------------------------
Fredrick C. Hawkins, III                       ONESOFT CORPORATION

                                               By: /s/ James W. MacIntyre, IV
                                                  ------------------------------
                                               Name: James W. MacIntyre, IV
                                               Title: Chairman & CEO

                                       5
<PAGE>

                                  SCHEDULE A

                              PLEDGED SECURITIES

Owner                    Certificate Number     Number of Shares of Common Stock
-----                    ------------------     --------------------------------

Fredrick C. Hawkins, III                         100,000

                                       67<PAGE>

                                                                   Exhibit 10.32

                              ONESOFT CORPORATION

                        2000 EMPLOYEE STOCK PURCHASE PLAN

     The following constitute the provisions of the 2000 Employee Stock Purchase
Plan (the "Plan") of OneSoft Corporation (the "Company").

     1.  Purpose. The purpose of the Plan is to provide Employees of the Company
         -------
and its Designated Subsidiaries with an opportunity to purchase Common Stock of
the Company. It is the intention of the Company to have the Plan qualify as an
"Employee Stock Purchase Plan" under Section 423 of the Internal Revenue Code of
1986, as amended. The provisions of the Plan shall, accordingly, be construed so
as to extend and limit participation in a manner consistent with the
requirements of that section of the Code.

     2.  Definitions.
         -----------

     (a) "Board" shall mean the Board of Directors of the Company, or a
          -----
committee of the Board of Directors named by the Board to administer the Plan.

     (b) "Code" shall mean the Internal Revenue Code of 1986, as amended.
          ----

     (c) "Common Stock" shall mean the Common Stock, $.001 par value, of the
          ------------
Company.

     (d) "Company" shall mean OneSoft Corporation, a Delaware corporation.
          -------

     (e) "Compensation" shall mean all compensation that is taxable income for
          ------------
federal income tax purposes, including, payments for overtime, shift premium,
incentive compensation, incentive payments, bonuses, commissions and other
compensation.

     (f) "Continuous Status as an Employee" shall mean the absence of any
          --------------------------------
interruption or termination of service as an Employee. Continuous Status as an
Employee shall not be considered interrupted in the case of a leave of absence
agreed to in writing by the Company, provided that such leave is for a period of
not more than 90 days or reemployment upon the expiration of such leave is
guaranteed by contract or statute.

     (g) "Contributions" shall mean all amounts credited to the account of a
          -------------
participant pursuant to the Plan.

     (h) "Designated Subsidiaries" shall mean the Subsidiaries which have been
          -----------------------
designated by the Board from time to time in its sole discretion as eligible to
participate in the Plan.

     (i) "Employee" shall mean any person, including an officer, who is
          --------
customarily employed for at least 20 hours per week and more than five months in
a calendar year by the Company or one of its Designated Subsidiaries.

     (j) "Exercise Date" shall mean the last day of each Offering Period of the
          -------------
Plan.

     (k) "Offering Date" shall mean the first business day of each Offering
          -------------
Period of the Plan, except that in the case of an individual who becomes an
eligible Employee after the first business day of an Offering Period but on or
prior to the first business day of the fourth calendar month within such
<PAGE>

Offering Period, the term "Offering Date" shall mean the first business day of
such fourth calendar month coinciding with or next succeeding the day on which
that individual becomes an eligible Employee.

     Options granted after the first business day of an Offering Period will be
subject to the same terms as the options granted on the first business day of
such Offering Period except that they will have a different grant date (thus,
potentially, a different exercise price) and, because they expire at the same
time as the options granted on the first business day of such Offering Period, a
shorter term.

     (l) "Offering Period" shall mean a period of six (6) months commencing on
          ---------------
November 1 and May 1 of each calendar year, other than the first Offering Period
as set forth in Section 4.

     (m) "Plan" shall mean this OneSoft Corporation 2000 Employee Stock Purchase
          ----
Plan.

     (n) "Subsidiary" shall mean a corporation, domestic or foreign, of which
          ----------
not less than 50% of the voting shares are held by the Company or a Subsidiary,
whether or not such corporation now exists or is hereafter organized or acquired
by the Company or a Subsidiary.

     3.  Eligibility.
         -----------

     (a) Any person who has been continuously employed as an Employee for three
(3) months as of the Offering Date of a given Offering Period shall be eligible
to participate in such Offering Period under the Plan, provided that such person
was not eligible to participate in such Offering Period as of any prior Offering
Date, and further, subject to the requirements of paragraph 5(a) and the
limitations imposed by Section 423(b) of the Code.

     (b) Any provisions of the Plan to the contrary notwithstanding, no Employee
shall be granted an option under the Plan (i) if, immediately after the grant,
such Employee (or any other person whose stock would be attributed to such
Employee pursuant to Section 424(d) of the Code) would own stock and/or hold
outstanding options to purchase stock possessing five percent (5%) or more of
the total combined voting power or value of all classes of stock of the Company
or of any Subsidiary of the Company, (ii) which permits his or her rights to
purchase stock under all employee stock purchase plans (described in Section 423
of the Code) of the Company and its Subsidiaries to accrue at a rate which
exceeds $25,000 of fair market value of such stock (determined at the time such
option is granted) for each calendar year in which such option is outstanding at
any time, or (iii) to purchase more than 1000 shares of Common Stock in any one
Offering Period. Any option granted under the Plan shall be deemed to be
modified to the extent necessary to satisfy this paragraph (b).

     4.  Offering Periods. The Plan shall be implemented by a series of Offering
         ----------------
Periods, with a new Offering Period commencing on May 1 and November 1 of each
year (or at such other time or times as may be determined by the Board of
Directors). The initial Offering Period shall commence at a time to be
determined by the Board and continue until October 31, 2000. The Plan shall
continue until terminated in accordance with paragraph 19 hereof. The Board of
Directors of the Company shall have the power to change the duration and/or the
frequency of Offering Periods with respect to future offerings without
stockholder approval if such change is announced at least 15 days prior to the
scheduled beginning of the first Offering Period to be affected.

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<PAGE>

     5.  Participation.
         -------------

     (a) An eligible Employee may become a participant in the Plan by completing
an Enrollment Form provided by the Company and filing it with the Company prior
to the applicable Offering Date, unless a later time for filing the Enrollment
Form is set by the Board for all eligible Employees with respect to a given
Offering Period. The Enrollment Form and their submission may be electronic, as
directed by the Company. The Enrollment Form shall set forth the percentage of
the participant's Compensation (subject to Section 6(a) below) to be paid as
Contributions pursuant to the Plan.

     (b) Payroll deductions shall commence on the first payroll following the
Offering Date and shall end on the last payroll paid on or prior to the Exercise
Date of the Offering Periods to which the Enrollment Form is applicable, unless
sooner terminated by the participant as provided in paragraph 10.

     6.  Method of Payment of Contributions.
         ----------------------------------

     (a) A participant shall elect to have payroll deductions made on each
payday during the Offering Period in an amount not less than 1% and not more
than 10% (or such greater percentage as the Board may establish from time to
time before an Offering Date) of such participant's Compensation on each such
payday. All payroll deductions made by a participant shall be credited to his or
her account under the Plan. A participant may not make any additional payments
into such account.

     (b) A participant may discontinue his or her participation in the Plan as
provided in paragraph 10, or, on one occasion only during the Offering Period,
may decrease, but may not increase, the rate of his or her Contributions during
the Offering Period by completing and filing with the Company a new Enrollment
Form authorizing a change in the deduction rate. The change in rate shall be
effective as of the beginning of the next payroll period following the date of
the filing of the new Enrollment Form, if the Enrollment Form is completed at
least ten (10) business days prior to such date, and, if not, as of the
beginning of the next succeeding payroll period.

     (c) Notwithstanding the foregoing, to the extent necessary to comply with
Section 423(b)(8) of the Code and paragraph 3(b) hereof, a participant's payroll
deductions may be decreased to 0% at such time and for so long as the aggregate
of all payroll deductions accumulated with respect to the current Offering
Period and any other Offering Period ending within the current calendar year
equals $21,250. Payroll deductions shall recommence at the rate provided in such
participant's Enrollment Form at the beginning of the first Offering Period
which is scheduled to end in the following calendar year, unless terminated by
the participant as provided in paragraph 10.

     7.  Grant of Option.
         ---------------

     (a) On the Offering Date of each Offering Period, each eligible Employee
participating in such Offering Period shall be granted an option to purchase on
the Exercise Date of such Offering Period a number of shares of the Common Stock
determined by dividing such Employee's Contributions accumulated prior to such
Exercise Date and retained in the participant's account as of the Exercise Date
by the lower of (i) 85% of the fair market value of a share of Common Stock on
the Offering Date, or (ii) 85% of the fair market value of a share of the Common
Stock on the Exercise Date; provided however, that such purchase shall be
subject to the limitations set forth in Sections 3(b) and 12 hereof. The fair
market value of a share of the Common Stock shall be determined as provided in
Section 7(b) herein.

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<PAGE>

     (b) The option price per share of the shares offered in a given Offering
Period shall be the lower of (i) 85% of the fair market value of a share of the
Common Stock on the Offering Date, or (ii) 85% of the fair market value of a
share of the Common Stock on the Exercise Date. The fair market value of the
Common Stock on a given date shall be determined by the Board in its discretion
based on the closing sale price of the Common Stock for such date (or, in the
event that the Common Stock is not traded on such date, on the immediately
preceding trading date), as reported by the National Association of Securities
Dealers Automated Quotation (Nasdaq) National Market or, if such price is not
reported, the mean of the bid and asked prices per share of the Common Stock as
reported by Nasdaq or, in the event the Common Stock is listed on a stock
exchange, the fair market value per share shall be the closing sale price on
such exchange on such date (or, in the event that the Common Stock is not traded
on such date, on the immediately preceding trading date), as reported in The
Wall Street Journal.

     8.  Exercise of Option.  Unless a participant withdraws from the Plan as
         ------------------
provided in paragraph 10, his or her option for the purchase of shares will be
exercised automatically on the Exercise Date of the Offering Period, and the
maximum number of full shares subject to option will be purchased for him or her
at the applicable option price with the accumulated Contributions in his or her
account.  If a fractional number of shares results, then such number shall be
rounded down to the next whole number and any unapplied cash shall be carried
forward to the next Exercise Date, unless the participant requests a cash
payment.  The shares purchased upon exercise of an option hereunder shall be
deemed to be transferred to the participant on the Exercise Date.  During a
participant's lifetime, a participant's option to purchase shares hereunder is
exercisable only by him or her.

     9.  Delivery.  Upon the written request of a participant, certificates
         --------
representing the shares purchased upon exercise of an option will be issued as
promptly as practicable after the Exercise Date of each Offering Period to
participants who wish to hold their shares in certificate form.  Any cash
remaining in a participant's account under the Plan after a purchase by him or
her of shares at the termination of each Offering Period shall be carried
forward to the next Exercise Date unless the participant requests a cash
payment.

     10. Withdrawal; Termination of Employment.
         -------------------------------------

     (a) A participant may withdraw all but not less than all the Contributions
credited to his or her account under the Plan at any time prior to the Exercise
Date of the Offering Period by giving written notice to the Company. All of the
participant's Contributions credited to his or her account will be paid to him
or her promptly after receipt of his or her notice of withdrawal and his or her
option for the current period will be automatically terminated, and no further
Contributions for the purchase of shares will be made during the Offering
Period.

     (b) Upon termination of the participant's Continuous Status as an Employee
prior to the Exercise Date of the Offering Period for any reason, including
retirement or death, the Contributions credited to his or her account will be
returned to him or her or, in the case of his or her death, to the person or
persons entitled thereto under paragraph 14 hereof, and his or her option will
be automatically terminated.

     (c) In the event an Employee fails to remain in Continuous Status as an
Employee for at least 20 hours per week during the Offering Period in which the
Employee is a participant, he or she will be deemed to have elected to withdraw
from the Plan and the Contributions credited to his or her account will be
returned to him or her and his or her option terminated.

                                       4
<PAGE>

     (d) A participant's withdrawal from an Offering Period will not have any
effect upon his or her eligibility to participate in a succeeding offering or in
any similar plan which may hereafter be adopted by the Company.

     11. Interest. No interest shall accrue on the Contributions of a
         --------
participant in the Plan.

     12. Stock.
         -----

     (a) The maximum number of shares of Common Stock which shall be made
available for sale under the Plan shall be 200,000 shares, plus an annual
increase beginning January 1, 2001 and ending on January 1, 2009, equal to the
lesser of (i) 1% of the Company's outstanding Common Stock, on a fully diluted,
as converted basis, or (ii) such lesser number of shares as determined by the
Board, with an aggregate maximum number of shares available under the Plan over
the life of the Plan of 2,000,000 shares, subject to adjustment upon changes in
capitalization of the Company as provided in paragraph 18. If the total number
of shares which would otherwise be subject to options granted pursuant to
Section 7(a) hereof on the Offering Date of an Offering Period exceeds the
number of shares then available under the Plan (after deduction of all shares
for which options have been exercised or are then outstanding), the Company
shall make a pro rata allocation of the shares remaining available for option
grants in as uniform a manner as shall be practicable and as it shall determine
to be equitable. Any amounts remaining in an Employee's account not applied to
the purchase of stock pursuant to this Section 12 shall be refunded on or
promptly after the Exercise Date. In such event, the Company shall give written
notice of such reduction of the number of shares subject to the option to each
Employee affected thereby and shall similarly reduce the rate of Contributions,
if necessary.

     (b) The participant will have no interest or voting right in shares covered
by his or her option until such option has been exercised.

     13. Administration.  The Board shall supervise and administer the Plan and
         --------------
shall have full power to adopt, amend and rescind any rules deemed desirable and
appropriate for the administration of the Plan and not inconsistent with the
Plan, to construe and interpret the Plan, and to make all other determinations
necessary or advisable for the administration of the Plan.

     14. Designation of Beneficiary.
         --------------------------

     (a) A participant may file a written designation of a beneficiary who is to
receive any shares and cash, if any, from the participant's account under the
Plan in the event of such participant's death subsequent to the end of the
Offering Period but prior to delivery to him or her of such shares and cash. In
addition, a participant may file a written designation of a beneficiary who is
to receive any cash from the participant's account under the Plan in the event
of such participant's death prior to the Exercise Date of the Offering Period.
If a participant is married and the designated beneficiary is not the spouse,
spousal consent shall be required for such designation to be effective.

     (b) Such designation of beneficiary may be changed by the participant (and
his or her spouse, if any) at any time by written notice. In the event of the
death of a participant and in the absence of a beneficiary validly designated
under the Plan who is living at the time of such participant's death, the
Company shall deliver such shares and/or cash to the executor or administrator
of the estate of the participant, or if no such executor or administrator has
been appointed (to the knowledge of the Company), the Company, in its
discretion, may deliver such shares and/or cash to the spouse or to any one or
more dependents or relatives of the participant, or if no spouse, dependent or
relative is known to the Company, then to such other person as the Company may
designate.

                                       5
<PAGE>

     15. Transferability. Neither Contributions credited to a participant's
         ---------------
account nor any rights with regard to the exercise of an option or to receive
shares under the Plan may be assigned, transferred, pledged or otherwise
disposed of in any way (other than by will, the laws of descent and distribution
or as provided in paragraph 14 hereof) by the participant. Any such attempt at
assignment, transfer, pledge or other disposition shall be without effect,
except that the Company may treat such act as an election to withdraw funds in
accordance with paragraph 10 hereof.

     16. Use of Funds. All Contributions received or held by the Company under
         ------------
the Plan may be used by the Company for any corporate purpose, and the Company
shall not be obligated to segregate such Contributions.

     17. Reports. Individual accounts will be maintained for each participant in
         -------
the Plan. Statements of account will be given to participating Employees
promptly following the Exercise Date, which statements will set forth the
amounts of Contributions, the per share purchase price, the number of shares
purchased and the remaining cash balance, if any.

     18. Adjustments Upon Changes in Capitalization. Subject to any required
         ------------------------------------------
action by the stockholders of the Company, the number of shares of Common Stock
covered by unexercised options under the Plan and the number of shares of Common
Stock which have been authorized for issuance under the Plan but are not yet
subject to options (collectively, the "Reserves"), the maximum number of shares
of Common Stock that may be purchased by a participant in an Offering Period, as
well as the price per share of Common Stock covered by each unexercised option
under the Plan, shall be proportionately adjusted for any increase or decrease
in the number of issued shares of Common Stock resulting from a stock split,
reverse stock split, stock dividend, combination or reclassification of the
Common Stock, or any other increase or decrease in the number of shares of
Common Stock effected without receipt of consideration by the Company; provided,
however, that conversion of any convertible securities of the Company shall not
be deemed to have been "effected without receipt of consideration." Such
adjustment shall be made by the Board, whose determination in that respect shall
be final, binding and conclusive. Except as expressly provided herein, no issue
by the Company of shares of stock of any class, or securities convertible into
shares of stock of any class, shall affect, and no adjustment by reason thereof
shall be made with respect to, the number or price of shares of Common Stock
subject to an option.

     In the event of the proposed dissolution or liquidation of the Company, an
Offering Period then in progress will terminate immediately prior to the
consummation of such proposed action, unless otherwise provided by the Board. In
the event of a proposed sale of all or substantially all of the assets of the
Company, or the merger of the Company with or into another corporation, each
option outstanding under the Plan shall be assumed or an equivalent option shall
be substituted by such successor corporation or a parent or subsidiary of such
successor corporation, unless the Board determines, in the exercise of its sole
discretion and in lieu of such assumption or substitution, to shorten the
Offering Period then in progress by setting a new Exercise Date (the "New
Exercise Date"). If the Board shortens the Offering Period then in progress in
lieu of assumption or substitution in the event of a merger or sale of assets,
the Board shall notify each participant in writing, at least ten days prior to
the New Exercise Date, that the Exercise Date for his or her option has been
changed to the New Exercise Date and that his or her option will be exercised
automatically on the New Exercise Date, unless prior to such date he or she has
withdrawn from the Offering Period as provided in paragraph 10 hereof. For
purposes of this paragraph, an option granted under the Plan shall be deemed to
be assumed if, following the sale of assets or merger, the option confers the
right to purchase, for each share of Common Stock subject to the option
immediately prior to the sale of assets or merger, the consideration (whether
stock, cash or other securities or property) received in the sale of assets or
merger by holders of Common Stock for each share of Common Stock held on the
effective date of the transaction (and if such holders were offered a choice of
consideration, the type of

                                       6
<PAGE>

consideration chosen by the holders of a majority of the outstanding shares of
Common Stock); provided, however, that if such consideration received in the
sale of assets or merger was not solely common stock of the successor
corporation or its parent (as defined in Section 424(e) of the Code), the Board
may, with the consent of the successor corporation, provide for the
consideration to be received upon exercise of the option to be solely common
stock of the successor corporation or its parent equal in fair market value to
the per share consideration received by holders of Common Stock in the sale of
assets or merger.

     The Board may, if it so determines in the exercise of its sole discretion,
also make provision for adjusting the Reserves, as well as the price per share
of Common Stock covered by each outstanding option, in the event that the
Company effects one or more reorganizations, recapitalizations, rights offerings
or other increases or reductions of shares of its outstanding Common Stock, and
in the event of the Company being consolidated with or merged into any other
corporation.

     19. Amendment or Termination. The Board may at any time terminate or amend
         ------------------------
the Plan. Except as provided in paragraph 18 hereof, no such termination may
affect options previously granted, nor may an amendment make any change in any
option theretofore granted which adversely affects the rights of any
participant. In addition, to the extent necessary to comply with Section 423 of
the Code (or any successor rule or provision or any applicable law or
regulation), the Company shall obtain stockholder approval in such a manner and
to such a degree as so required.

     20. Notices. All notices or other communications by a participant to the
         -------
Company under or in connection with the Plan shall be deemed to have been duly
given when received in the form specified by the Company at the location, or by
the person, designated by the Company for the receipt thereof.

     21. Conditions Upon Issuance of Shares. Shares shall not be issued with
         ----------------------------------
respect to an option unless the exercise of such option and the issuance and
delivery of such shares pursuant thereto shall comply with all applicable
provisions of law, domestic or foreign, including, without limitation, the
Securities Act of 1933, as amended, the Securities Exchange Act of 1934, as
amended, the rules and regulations promulgated thereunder, and the requirements
of any stock exchange upon which the shares may then be listed, and shall be
further subject to the approval of counsel for the Company with respect to such
compliance.

     As a condition to the exercise of an option, the Company may require the
person exercising such option to represent and warrant at the time of any such
exercise that the shares are being purchased only for investment and without any
present intention to sell or distribute such shares if, in the opinion of
counsel for the Company, such a representation is required by any of the
aforementioned applicable provisions of law.

     22. Right to Terminate Employment. Nothing in the Plan or in any agreement
         -----------------------------
entered into pursuant to the Plan shall confer upon any Employee or other
optionee the right to continue in the employment of the Company or any
Subsidiary, or affect any right which the Company or any Subsidiary may have to
terminate the employment of such Employee or other optionee.

     23. Rights as a Stockholder. Neither the granting of an option nor
         -----------------------                                          a
deduction from payroll shall constitute an Employee the owner of shares covered
by an option. No optionee shall have any right as a stockholder unless and until
an option has been exercised, and the shares underlying the option have been
registered in the Company's share register.

     24. Term of Plan. The Plan became effective upon its adoption by the Board
         ------------
of Directors in February, 2000 and shall continue in effect for a term of ten
(10) years unless sooner terminated under paragraph 19 hereof.

                                       7
<PAGE>

     25. Applicable Law. This Plan shall be governed in accordance with the laws
         --------------
of the State of Delaware, applied without giving effect to any conflict-of-law
principles.

                                       8

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