Document:

<PAGE>   1
                                                                 EXHIBIT 10.7(b)

                             AMENDMENT TO NET LEASE

         THIS AMENDMENT TO NET LEASE (the "Amendment") is made as of November 8,
2000, between PRETTY M.T., L.P., a Delaware limited partnership ("LANDLORD") and
SPECTRUM INTEGRATED SERVICES, INC., d/b/a SOFTWARE SPECTRUM, a Texas corporation
("TENANT").

         A. Landlord and Tenant entered into that certain Net Lease (the
"Original Lease"), dated April 28, 2000, for the lease of certain premises
located 5201 Rufe Snow, North Richland Hills, Tarrant County, Texas (the
"Demised Premises").

         B. Landlord and Tenant desire to amend the Original Lease, as is set
forth in this Amendment. All defined terms used and not otherwise defined herein
shall have the meaning set forth in the Original Lease.

         Now, therefore, for good and valuable consideration, Landlord and
Tenant do hereby amend the Original Lease as follows:

1. Section 1.3 of the Summary is amended in its entirety to read as follows:

         "1.3 Premises: An area which the parties hereto hereby stipulate and
agree consists of 73,159 rentable square feet of space and is more particularly
described in the Exhibit A attached to the Lease (the "Initial Premises")
located in that certain building (the "Building") having an address of 5201 Rufe
Snow, North Richland Hills, Texas, and which Building is located on the land
(the "Land") more particularly described in the Exhibit B attached to the Lease
(the Land, the Building and all other improvements now or hereafter located on
the Land are herein collectively referred to as the "Project"). As used in the
Lease, the term "Premises" shall mean the Initial Premises together with any
other space in the Project hereafter leased to Tenant pursuant to the terms and
provisions of the Lease and the Exhibits attached thereto. The common area or
multi-tenant add on factor for the Project is 1%."

2. Section 1.4 of the Summary is amended in its entirety to read as follows:

         "1.4 Commencement Date: For the portion of the Initial Premises
depicted as "Portion 1"on Exhibit A-1, the earlier to occur of September 1, 2000
and the date upon which Tenant actually commences to do business in such portion
of the Initial Premises. For the portion of the Initial Premises depicted as
"Portion 2" on Exhibit A-2, the earlier of November 15, 2000 and the date upon
which Tenant actually commences to do business in such portion of the Initial
Premises. For the portion of the Initial Premises depicted as "Portion 3" on
Exhibit A-3, the earlier of March 15, 2001 and the date upon which Tenant
actually commences to do business in such portion of the Initial Premises. For
purposes hereof, Tenant's early entry on the Premises in accordance with Section
2.0 of this Summary shall not be deemed to constitute doing business in the
Premises. "

3. Section 1.5 of the Summary is amended in its entirety to read as follows:

         "1.5 Rent Commencement Date: For the portion of the Initial Premises
depicted on Exhibit A-1, the earlier to occur of September 1, 2000 and the date
upon which Tenant actually commences to do business in such portion of the
Initial Premises. For the portion of the Initial Premises depicted on Exhibit
A-2, the earlier to occur of November 15, 2000 and the date upon which Tenant
actually commences to do business in such portion of the Initial Premises. For
the portion of the Initial Premises depicted on Exhibit A-3, the earlier to
occur of March 15, 2001 and the date upon which Tenant actually commences to do
business in such portion of the Initial Premises. For purposes hereof, Tenant's
early entry on the Premises in accordance with Section 2.0 of this Summary shall
not be deemed to constitute doing business in the Premise."

4. Section 1.6 of the Summary is amended in its entirety to read as follows:

         "1.6 Lease Expiration Date: The last day of the eighty-seventh (87th)
full calendar month after the first Rent Commencement Date set forth in Section
1.5 of the Summary, which the parties anticipate to be November 30, 2007."

                                       1
<PAGE>   2

5. Landlord shall provide a credit to the Allowance and shall increase the
Allowance in an amount of up to $13,729.00 for the following matters:

         a. $3,129.00 for the cost of directional monument sign described in
Section 6.4 and on Exhibit G-3 of the Original Lease. The foregoing credit shall
be in lieu of the directional monument sign described in Section 6.4 and on
Exhibit G-3 of the Original Lease. The term "Tenant's Sign" is hereby amended to
exclude all references to a directional monument sign, and Tenant shall not be
permitted to install and Landlord shall not be required to pay for any
directional monument sign.

         b. The lesser of (i) $4,000 and (ii) the actual out of pocket costs
incurred by Tenant in installing a sound barrier wall along the northwest
(adjacent to the space occupied by 24 Hour Fitness) boundary of the Premises.
The foregoing wall shall be designed and installed by Tenant and shall be
subject to all terms and conditions of the Original Lease regarding improvements
by Tenant.

         c. The lesser of (i) $3,100 and (ii) the actual out of pocket costs
incurred by Tenant in connecting the HVAC units serving the Premises to the fire
alarm system for the Building. The foregoing work shall be designed and
installed by Tenant and shall be subject to all terms and conditions of the
Original Lease regarding improvements by Tenant.

         d. The lesser of (i) $1,500 and (ii) the actual out of pocket costs
incurred by Tenant in providing additional design work for Tenant's HVAC
ductwork in the Premises. The foregoing work shall be designed and installed by
Tenant and shall be subject to all terms and conditions of the Original Lease
regarding improvements by Tenant.

         e. The lesser of (i) $2,000 and (ii) the actual out of pocket costs
incurred by Tenant in replacing the restroom counters located in the Premises.
The foregoing work shall be designed and installed by Tenant and shall be
subject to all terms and conditions of the Original Lease regarding improvements
by Tenant.

All credits to Tenant pursuant to this Amendment shall be made solely by
increasing the Allowance and shall be subject to the terms and conditions set
forth in Exhibit L of the Original Lease.

6. Landlord Improvements.

         a. Tenant hereby acknowledges that except for the matters described on
Schedule 7 attached hereto, all of the improvements described on Exhibit K-1 and
on Exhibit K-2 of the Original Lease have been substantially completed by
Landlord.

         b. Landlord shall substantially complete the matters described on
Schedule 7 attached hereto by the dates set forth in Schedule 7, which dates
shall amend and replace any completion dates for such matters set forth in the
Original Lease.

         c. Tenant acknowledges that by execution of this Amendment, Tenant
waives and releases all claims against Landlord arising out of or in connection
with any failure by Landlord to substantially complete the improvements
described on Exhibit K-1 and on Exhibit K-2 of the Original Lease within the
time periods set forth in the Original Lease.

         d. Landlord and Tenant hereby acknowledge and agree that Landlord has
delivered possession of the Initial Premises to Tenant and that Tenant has
accepted possession of the Initial Premises.

7. Exhibits.

         a. The heading of Exhibit A-1 is hereby amended in its entirety to read
"DEPICTION OF THE PORTION OF THE INITIAL PREMISES - COMMENCEMENT DATE OF
SEPTEMBER 1, 2000."

         b. The heading of Exhibit A-2 of is hereby amended in its entirety to
read "DEPICTION OF THE PORTION OF THE INITIAL PREMISES - COMMENCEMENT DATE OF
NOVEMBER 15, 2000."

         c. The heading of Exhibit A-3 is hereby amended in its entirety to read
"DEPICTION OF THE PORTION OF

                                       2
<PAGE>   3

THE INITIAL PREMISES - COMMENCEMENT DATE OF MARCH 15, 2001."

         d. Exhibit G-3 is hereby amended in its entirety to read:
"INTENTIONALLY DELETED."

         e. Paragraph 1 of Exhibit K-2 is amended in its entirety to read:
"Parking Lot shall be newly sealed and striped. A new asphalt parking lot with
an average of 2 foot-candle parking lot lighting shall be constructed to the
west and shall be completed by the second move-in date (November 15, 2000);
provided, however, Landlord advises Tenant that Landlord has reason to believe
that the completion of the parking lot by November 15, 2000 may be subject to
Force Majeure Delays as a result of the actions and omissions of the City of
North Richland Hills. A new curb cut and approach will be constructed off Combs
Road for frontage access directly in front of Tenant's entrance." The parties
acknowledge that the new curb cut and approach off Combs Road for frontage
access directly in front of Tenant's entrance has been completed as of the date
of this Amendment.

8. This Amendment is executed and accepted by the parties in settlement of
certain disputes regarding the Original Lease. Nothing contained herein shall be
deemed to be an admission of liability by Landlord or by Tenant. As amended and
supplemented hereby, the Original Lease is ratified and shall remain in full
force and effect. Upon execution hereof, the term "Lease" shall mean the
Original Lease as amended and supplemented by this Amendment. In the event of a
conflict between this Amendment and the Original Lease, this Amendment shall
control.

                         [SIGNATURES ON FOLLOWING PAGE]

                                       3
<PAGE>   4

         IN WITNESS WHEREOF, the parties have executed this Amendment as of the
day and year first above written.

LANDLORD:
PRETTY M.T., L.P.,
a Delaware limited partnership

By:  PRA-JSF GP, L.P.,
     a Texas limited partnership,
     its general partner
     By: PRA GENERAL PARTNER, INC.,
             a Texas corporation,
             its general partner

             By: /s/ Leon J. Backes
                --------------------------------
                     Leon J. Backes, President

TENANT:
SPECTRUM INTEGRATED SERVICES, INC.,
d/b/a SOFTWARE SPECTRUM,
a Texas corporation

By:/s/ Robert D. Graham
   ---------------------------------------------------
         Name:  Robert D. Graham
              ----------------------------------------
         Title:  Vice President
               ---------------------------------------

                                       4
<PAGE>   5

                                   SCHEDULE 7

<Table>
<Caption>
WORK                                 SUBSTANTIAL COMPLETION DATE
----                                 ---------------------------
<S>                                  <C>
Retaining Wall                       December 15, 2000 *
                                          *(subject to Force Majeure Delays as a
                                          result of the actions and omissions of
                                          the City of North Richland Hills)

Parking Lot Expansion                December 15, 2000 *
                                          *(subject to Force Majeure Delays as a
                                          result of the actions and omissions of
                                          the City of North Richland Hills)
</Table>

                                       5<PAGE>   1
                                                                   EXHIBIT 10.10

                             SOFTWARE SPECTRUM, INC.
            SECOND AMENDED AND RESTATED EMPLOYEE STOCK PURCHASE PLAN

                                    ARTICLE I

                                NAME AND PURPOSE

         1.1 Name. The name of this Plan is the "Software Spectrum, Inc. Second
Amended and Restated Employee Stock Purchase Plan."

         1.2 Purpose and Construction. The Company has established this Plan to
encourage and facilitate the purchase of its Common Stock by Eligible Employees,
as an incentive to Eligible Employees, so that they may share in the growth of
the Company by acquiring or increasing their proprietary interest in the
Company. This Plan is intended to qualify as an "Employee Stock Purchase Plan"
under Section 423 of the Code. Consequently, the provisions of this Plan shall
be construed in a manner consistent with the requirements of Section 423 of the
Code. Any term or provision of this Plan which is inconsistent with the
requirements of Section 423 of the Code shall be inapplicable.

                                   ARTICLE II

                              DEFINITIONS OF TERMS

         2.1 General Definitions. The following words and phrases, when used in
the Plan, unless otherwise specifically defined or unless the context clearly
otherwise requires, shall have the following respective meanings:

                  (a) Board. The Board of Directors of the Company.

                  (b) Code. The Internal Revenue Code of 1986, as amended. Any
         reference to the Code includes the regulations promulgated pursuant to
         the Code.

                  (c) Company. Software Spectrum, Inc.

                  (d) Common Stock. The Company's $0.01 par value common stock.

                  (e) Compensation. The total gross compensation, including
         salary, bonuses and commissions, of an Employee, but excluding any
         amounts realized from the exercise of a stock option, or from the sale,

<PAGE>   2

         exchange or other disposition of Shares acquired under this Plan or any
         other stock purchase plan.

                  (f) Effective Date. September 1, 1992. However, in order to
         remain effective, the Plan must be approved by the shareholders of the
         Company within one year before or after approval by the Board. Any
         Offerings made prior to the approval by the shareholders of the Company
         shall be void if such approval is not obtained.

                  (g) Employee. A salaried or hourly employee as determined
         based on the payroll records of the Company or a Subsidiary; provided,
         however, that the following shall not be considered "Employees" for
         purposes of the Plan: (i) any employee who is a leased employee within
         the meaning of Code Section 414(n); (ii) any employee whose terms and
         conditions of employment are governed by a collective bargaining
         agreement and with respect to whom inclusion in the Plan has not been
         specifically provided for in such collective bargaining agreement; and
         (iii) any individual who is an independent contractor (including any
         individual who is recharacterized by the Internal Revenue Service as a
         common law employee, for periods during which such individual was
         treated as an independent contractor by the Company or a Subsidiary).

                  (h) Employer. With respect to each Offering, the Company and
         those of its Parents and Subsidiaries designated from time to time
         whose Employees will be eligible to be granted Options to purchase
         Common Stock in such Offering.

                  (i) Entry Date. Entry Dates shall be each January 1, April 1,
         July 1 and October 1.

                  (j) Exercise Date. The first business day following the 15th
         day of each month (or the next business day thereafter if the fifteenth
         day of the month falls on a non-business day) upon which the Company
         has acquired a sufficient number of Shares on the open market to
         satisfy its obligation with respect to Shares to be purchased during a
         given Offering under the Plan. If the Company elects to use authorized
         but unissued Shares or treasury Shares to satisfy its obligation with
         respect to shares purchased hereunder, the Exercise Date shall be the
         15th day of the month (or the next business day thereafter if the
         fifteenth day of the month falls on a non-business day).

                  (k) Fair Market Value. The Fair Market Value of a Share with
         respect to an Exercise Date shall be the average price per Share paid
         by the Company to acquire the Shares used by the Company to satisfy its
         obligation with respect to Shares to be purchased during a given
         Offering under the Plan; provided, however, that if the Company elects
         to use

<PAGE>   3

         authorized but unissued Shares or treasury Shares to satisfy its
         obligation with respect to Shares purchased hereunder, Fair Market
         Value shall be the closing price of Shares on the NASDAQ National
         Market System on the Exercise Date (if there is no quoted closing price
         on such date, the closing price shall be determined as of the most
         recent date following the Exercise Date on which there is a quoted
         closing price on the NASDAQ National Market System).

                  (l) Offering. An offering consisting of grants of Options to
         purchase Shares under the Plan. The initial Offering under the Plan
         shall commence on September 1, 1992, and shall terminate on October 15,
         1992. Effective September 15, 2001, each Offering under the Plan shall
         commence on the fifteenth day of the month (or the next business day
         thereafter if the fifteenth day of the month falls on a non-business
         day) and shall terminate as of the fourteenth day of the next month
         (or, if the fifteenth day of the next month is not a business day, the
         date immediately preceding the next subsequent business day). .

                  (m) Officer. Any Employee who is an officer of the Employer as
         that term is defined under Rule 16(a)-1(f) of the rules promulgated
         under the Securities Exchange Act of 1934, as amended.

                  (n) Option. An option granted under the Plan to purchase
         Shares.

                  (o) Parent. Any corporation (other than the Company or a
         Subsidiary) in an unbroken chain of corporations ending with the
         Company, if, at the time of the grant of an Option, each of the
         corporations (other than the Company or a Subsidiary) owns stock
         possessing 50% or more of the total combined voting power of all
         classes of stock in one of the other corporation in such chain.

                  (p) Participant. An eligible Employee who has elected to
         participate in the Plan.

                  (q) Plan. The Software Spectrum, Inc. Second Amended and
         Restated Employee Stock Purchase Plan and all amendments and
         supplements to it.

                  (r) Share. A share of Common Stock.

                  (s) Subsidiary. Any corporation or entity organized under the
         laws of the United States or any state, other than the Company, in an
         unbroken chain of corporations beginning with the Company if, at the
         time of grant of an Option, each of the corporations, other than the
         last

<PAGE>   4

         corporation in the unbroken chain, owns stock possessing 50% or more of
         the total combined voting power of all classes of stock in one of the
         other corporations in such chain.

         2.2 Other Definitions. In addition to the above definitions, certain
words and phrases used in the Plan and in any Offering may be defined in other
portions of the Plan or in such Offering.

                                   ARTICLE III

                          ELIGIBILITY AND PARTICIPATION

         3.1 Initial Eligibility. An Employee who has completed six (6) months
employment shall be eligible to participate on and after the first Entry Date
following his completion of his initial six (6) months of employment. For
purposes of determining eligibility, employment for an entity which is acquired
by an Employer or whose assets are acquired by an Employer shall not be treated
as employment by the Employer unless the Board shall make a determination
otherwise.

         3.2 Restrictions on Participation. Notwithstanding any provision of the
Plan to the contrary, no Employee shall participate in the Plan if:

                  (a) immediately after the grant, he would own (within the
         meaning of Section 423(b)(3) of the Code) 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 Parent or Subsidiary; or

                  (b) he is a part-time employee whose customary employment is
         twenty (20) hours or less per week; or

                  (c) he is an employee whose customary employment is for not
         more than five (5) months in any calendar year.

         3.3 Eligibility for Rehired Employees. If an Employee who had
previously satisfied the initial eligibility requirements of Section 3.1 hereof
is subsequently rehired, such Employee shall be eligible to participate in
Offerings under the Plan on the first Entry Date following his rehire date. If
an Employee is rehired who had not previously satisfied the initial eligibility
requirements, the Employee must satisfy the employment requirements of section
3.1, considering only his employment service following his rehire date.

<PAGE>   5

                                   ARTICLE IV

                              SHARES TO BE OFFERED

         4.1 Number of Shares. Subject to the provisions of Section 4.3, the
aggregate number of shares for which Options may be granted under the Plan shall
be 315,000. Such Shares may be authorized but unissued Shares or reacquired
Shares, whether held in the treasury, or bought on the open market or otherwise
for purposes of the Plan. Any shares that are not subject to outstanding Options
upon the termination of the Plan shall cease to be subject to the Plan.

         4.2 Reusage. If an Option expires or is terminated, surrendered, or
cancelled without having been fully exercised, the shares covered by such Option
which were not purchased shall again be available for issuance under the Plan.

         4.3 Adjustments. If there is any change in the Common Stock of the
Company by reason of any stock dividend, spin-off, split-up, spin-out,
recapitalization, merger, consolidation, reorganization, combination or exchange
of shares, or otherwise, the number and class of shares available for Options,
the maximum number of Shares that may be purchased in the current Offering
Period, and the price per Share, as applicable, shall be appropriately adjusted
by the Committee.

                                    ARTICLE V

                      GRANTS, PARTICIPATION AND WITHDRAWAL

         5.1 Grant of Options. On his initial Entry Date following his becoming
eligible to participate in the Plan, each eligible Employee may execute and
deliver to the Company or its designee an agreement in the form approved by the
Company ("Participation Agreement") in accordance with the provisions of the
Offering, in order to be granted an Option to purchase Shares under the Plan.

         5.2 Nontransferability. No payroll deductions credited to a
Participant's stock purchase 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 by a Participant other than by will
or the laws of descent and distribution. Options under the Plan shall be
exercisable during a Participant's lifetime only by him, his guardian or legal
representative. Shares may be sold or otherwise transferred by a Participant
without restriction. Each Participant shall agree in the Participation Agreement
to notify the Company or its designee of any transfer of the Shares within two
years of the Exercise Date on which such Shares were purchased.

<PAGE>   6

         5.3 Election to Participate. An eligible Employee who wishes to
participate in the Plan must deliver his executed Participation Agreement to the
Company or its designee no later than required by the Company or its designee.
In such Participation Agreement, each eligible Employee may elect to have
deductions from his Compensation at the rate of a dollar amount per payroll
period or any whole percentage of his Compensation, but not in any event to
exceed ten percent (10%) of his Compensation. The minimum payroll deduction
amount per payroll period shall be $10 (U.S.). Each Participant's Participation
Agreement shall remain in effect for each Offering subsequent thereto until the
Participant either (a) ceases future contributions to his stock purchase account
in accordance with Section 5.5 of the Plan; or (b) increases or decreases his
payroll deduction contributions to the Plan, by completing a new Participation
Agreement. Any change shall be permitted only as of the end of the next payroll
period following each Entry Date if submitted to the Company or its designee no
later than ten (10) business days prior to the end of such payroll period. The
Board may permit any Participant to make an irrevocable election and to specify
the term of such election.

         5.4 Method of Payment and Stock Purchase Accounts. Payment for Shares
will be made through payroll deductions from the Participant's Compensation,
such deductions to be authorized by a Participant in the Participation
Agreement. A stock purchase account shall be set up on the books of the Company
or its designee in the name of each Participant. The amount of all payroll
deductions shall be credited to the respective stock purchase accounts of the
Participants on such books. The funds deducted and withheld by the Company
through payroll deductions may be used by the Company for any corporate purposes
as the Board shall determine, and the Company shall not be obligated to
segregate said funds in any way.

         5.5 Withdrawal from the Plan. A Participant may cease future
contributions to his stock purchase account, effective for the next payroll
period, by submitting a notice to the Company or its designee no later than ten
(10) business days prior to the end of such payroll period. Notwithstanding a
Participant's notice that future contributions will cease, the balance in the
Participant's stock purchase account will nevertheless be used to purchase
Shares at the next Exercise Date.

                                   ARTICLE VI

                                    OFFERINGS

         6.1 Offerings. There shall be a series of Offerings under the Plan
which shall occur on a monthly basis. Each Participant having funds in his stock
purchase account on an Exercise Date shall be deemed, without any further
action, to have purchased with the funds in his account the number of whole

<PAGE>   7

Shares which he has the right to purchase at the purchase price on that Exercise
Date.

         6.2 Terms of Offering. At least annually, the Board will determine all
of the terms and conditions of the Offerings for the next twelve (12) months,
which terms and conditions shall include, but not be limited to, the following:

                  (a) The number of Shares to be offered, which in no event
         shall exceed the maximum number of Shares then available under the
         provisions of ARTICLE IV.

                  (b) The Offering period. In no event shall an Option be
         exercisable after the expiration of five (5) years from the date each
         Option is granted.

                  (c) The price per Share for which Common Stock will be sold to
         Participants who exercise Options, which price shall not be less than
         85% of the Fair Market Value on the Exercise Date upon which the Option
         is exercised. Notwithstanding the foregoing, in no event shall the
         price per Share be less than the par value.

                  (d) All eligible Employees on an Entry Date shall be eligible
         with respect to the Options in an Offering that is continuing on and
         after such Entry Date. However, no Employee shall be granted an Option
         which permits his rights to purchase stock under all employee stock
         purchase plans (as defined in Section 423(b) of the Code) of the
         Company and its Parents and Subsidiaries to accrue at a rate which
         exceeds $15,000 of fair market value of such stock, determined as of
         the Exercise Date, for each calendar year in which such Option is
         outstanding at anytime.

                                   ARTICLE VII

                                PURCHASE OF STOCK

         7.1 Exercise of Option. Each Participant's Option to purchase Shares
will be automatically exercised for him on each Exercise Date for the number of
full Shares which the accumulated payroll deductions as of the Exercise Date
will purchase at the applicable Option price, subject to the limitations set
forth in the Plan and the Offering and subject to allotment in accordance with
Section 7.2. Any balance remaining in a Participant's stock purchase account
after the exercise of an Option will remain in such account unless the Plan is
terminated, in which event it will be refunded to such Participant.

         7.2 Allotment of Shares. In the event that, on any Exercise Date, the
aggregate funds and Shares available for the purchase of Shares, pursuant to the
provisions of Section 7.1, would purchase a greater number of Shares than

<PAGE>   8

the number of Shares then available for purchase under the Plan on such Exercise
Date, the Company shall issue to each Participant, on a pro rata basis, such
number of Shares as, when taken together with the Shares issued to all other
Participants, will result in the issuance of Shares totaling no more than the
number of Shares then remaining available for issuance under the Plan on such
Exercise Date. If, after such allotment, all of the Shares under an Offering
have been purchased, any balance remaining in a Participant's stock purchase
account shall be refunded to such Participant.

         7.3 Rights on Retirement, Death or Termination of Employment. In the
event of a Participant's retirement, death or termination of employment, no
payroll deduction shall be taken from any Compensation due and owing to him at
such time and the amount in the Participant's stock purchase account shall be
paid within thirty (30) days following request therefor, to the former Employee
or, in the event of his death, the person or persons to whom his rights pass by
will or the laws of descent and distribution including his estate during the
period of administration. An Employee of a Subsidiary or a Parent which ceases
to be a Subsidiary or a Parent shall be deemed to have terminated his employment
for purposes of this Section 7.3 as of the date such corporation ceases to be a
Subsidiary or a Parent, as the case may be, unless, as of such date, the
Employee shall become an Employee of the Company or any Subsidiary or Parent.

         7.4 Rights to Share Certificates. At least annually, each Participant
will receive a statement from the Company reflecting the number of Shares
purchased for his account and may at any time request delivery of certificates
for Shares reflected on his account. A Participant may be required to pay the
administrative fees associated with issuance of the certificates. Certificates
for Shares will be issued and delivered upon request as soon as practicable, in
the name of the Participant. The Company may designate any person to maintain
the accounts and records required under the Plan.

         7.5 Purchases and Sales by Officers. With respect to purchases of
Shares by Officers, such Officers shall hold such Shares for a period of not
less than six (6) months following the applicable Exercise Date unless such
Officer irrevocably elects to participate in the Plan not less than six (6)
months prior to the applicable Exercise Date.

                                  ARTICLE VIII

                                 ADMINISTRATION

         8.1 Board of Directors. The Plan shall be administered by the Board.

         8.2 Authority. Subject to the terms of the Plan, the Board shall have
complete authority to:

<PAGE>   9

                  (a) determine the terms and conditions of, and the eligible
         Employees under, each Offering, as described in ARTICLE VI;

                  (b) interpret and construe the Plan;

                  (c) prescribe, amend and rescind rules and regulations
         relating to the Plan;

                  (d) maintain accounts, records and ledgers relating to
         Options;

                  (e) maintain records concerning its decisions and proceedings;

                  (f) employ agents, attorneys, accountants or other persons for
         such purposes as the Board considers necessary or desirable; and

                  (g) do and perform all acts which it may deem necessary or
         appropriate for the administration of the Plan and to carry out the
         purposes of the Plan.

         8.3 Determinations; Action in Good Faith. All determinations of the
Board shall be final. No member of the Board and no designee of the Board shall
be liable for any action taken in good faith in its administration of the Plan.

         8.4 Delegation. The Board may delegate all or any part of its authority
under the Plan to any Employee, Employees or committee, and may retain such
third parties as it deems appropriate to administer the Plan and the purchase of
Shares pursuant to the Plan.

                                   ARTICLE IX

                            AMENDMENT AND TERMINATION

         9.1 Power of Board. Except as hereinafter provided, the Board shall
have the sole right and power to amend the Plan at any time and from time to
time.

         9.2 Limitation. The Board may not amend the Plan, without approval of
the shareholders of the Company:

                  (a) in a manner which would cause the Plan to fail to meet the
         requirements of Sections 423 of the Code;

                  (b) in a manner which materially increases the total number of
         shares which may be issued pursuant to options granted under the Plan;

<PAGE>   10

                  (c) in a manner which materially modifies the requirements as
         to eligibility for participation in the Plan; or

                  (d) in a manner which materially increases the benefits
         accruing to Participants under the Plan.

         9.3 Term. The Plan shall commence as of the Effective Date and, subject
to the terms of the Plan including those requiring approval by the shareholders
of the Company, shall continue to be in full force and effect until terminated.

         9.4 Termination. The Plan may be terminated at any time by the Board.
Subject to the Board's right to amend the Plan, with shareholder approval, to
increase the number of Shares available for purchase under the Plan, the Plan
shall automatically terminate when all of the Shares available for purchase have
been sold. Upon termination of the Plan, and the exercise or lapse of all
outstanding Options, any balances remaining in each Participant's stock purchase
account shall be refunded to him.

         9.5 Effect. The amendment or termination of the Plan shall not
adversely effect any Options granted prior to such amendment or termination.

                                    ARTICLE X

                            MISCELLANEOUS PROVISIONS

         10.1 Underscored References. The underscored references contained in
the Plan are included only for convenience, and they shall not be construed as a
part of the Plan or in any respect affecting or modifying its provisions.

         10.2 Number and Gender. The masculine and neuter, wherever used in the
Plan, shall refer to either the masculine, neuter or feminine; and, unless the
context otherwise requires, the singular shall include the plural and the plural
the singular.

         10.3 Governing Law. This Plan shall be construed and administered in
accordance with the laws of the State of Texas.

         10.4 Purchase for Investment. The Plan is intended to provide Common
Stock for investment and not for resale. The Company does not, however, intend
to restrict or influence any Employee in the conduct of his or her own affairs.
An Employee may therefore sell Shares purchased under the Plan at any time the
Employee chooses, subject to compliance with any applicable federal or state
securities laws. Provided, however, that because of certain federal tax
requirements, each Employee agrees by entering the Plan promptly to give the
Company notice of any Shares disposed of within two years after the Exercise

<PAGE>   11

Date of the applicable Option showing the number of such Shares disposed of. All
certificates for Shares delivered under the Plan shall be subject to such stock
transfer orders and other restrictions at the Company may deem advisable under
all applicable laws, rules, and regulations, and the Company may cause a legend
or legends to be put on any such certificates to make appropriate references to
such restrictions. THE EMPLOYEE ASSUMES THE RISK OF ANY MARKET FLUCTUATIONS IN
THE PRICE OF THE SHARES.

         10.5 No Employment Contract. The adoption of the Plan shall not confer
upon any Employee any right to continued employment nor shall it interfere in
any way with the right of the Company, a Parent or a Subsidiary to terminate the
employment of any of its employees at any time.

         10.6 Offset. In the event that any Participant wrongfully appropriates
funds or other property of an Employer and thereby becomes indebted to such
Employer, any funds or Shares in his stock purchase account may be applied
against and used to satisfy such indebtedness.

         10.7 Obligation to Deliver Shares. The Company's obligation to sell and
deliver shares of the Company's Common Stock under this Plan is subject to the
approval of any governmental authority required in connection with the
authorization, issuance or sale of such shares.

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