Document:

<PAGE>
                                                                    EXHIBIT 10.1

            "***" - Confidential portions of this Agreement have been
              omitted and filed separately with the Securities and
                           Exchange Commission under a
          Confidential Treatment Request, pursuant to Rule 24b-2 of the
                   Securities Exchange Act of 1934, as amended

                                  AMENDMENT TO

                             SALES AGENCY AGREEMENT

         This Amendment (the "Amendment") to the Sales Agency Agreement dated
March 14, 2002 (the "Agreement") between Pegasus Satellite Television, Inc.
("Pegasus") and Nucentrix Broadband Networks, Inc. ("Nucentrix") is made and
entered into this 21st day of May, 2002 (the "Effective Date").

                        A.          Pursuant to the terms of the Agreement,
                                    Nucentrix acts as one of Pegasus'
                                    commissioned sales agents to solicit certain
                                    of Nucentrix's MMDS customers in the
                                    Territory to order DIRECTV programming
                                    services distributed by Pegasus.

                        B.          The parties desire to amend certain terms of
                                    the Agreement.

                        C.          All capitalized terms not otherwise defined
                                    herein shall have the meaning described in
                                    the Agreement.

         NOW, THEREFORE, in consideration of the mutual covenants contained
herein and intending to be legally bound hereby, the parties agree as follows:

            1.          The following provision is hereby added to the Agreement
                        as Section 3.5 (h):

                        "At Pegasus' request, provide the Eligible MMDS
                        Subscriber with the current Pegasus referral brochure,
                        as it may be amended from time to time by Pegasus in its
                        sole discretion."

            2.          Section 8.2 of the Agreement is hereby amended in its
                        entirety as follows:

                        DIRECTV System Subsidy. "In addition, for each Eligible
            MMDS Subscriber who accepts a Consumer Offer, is provided a DIRECTV
            System and becomes a Converted Subscriber, Pegasus will pay
            Nucentrix a subsidy in the amount of "***" for each primary DIRECTV
            System ("Primary DIRECTV System") and "***" for each of the second,
            third and fourth DIRECTV receivers (each, an "Incremental Receiver")
            (collectively, the "DIRECTV System Subsidy"). Incremental Receivers
            after the Primary DIRECTV System, depending on the number of
            receivers being activated with respect to an individual account,
            also shall be referred to herein as the "Second," "Third" or
            "Fourth" DIRECTV Receiver. Nucentrix shall not be entitled to a
            DIRECTV System

                                       1
<PAGE>

            Subsidy with respect to any Primary DIRECTV System or Incremental
            Receiver that is acquired through a Pegasus equipment buy-down
            program.

                        Nucentrix shall only be entitled to payments for Third
            or Fourth DIRECTV Receivers under this Section 8.2 and under Section
            8.3(b) below, where the Third or Fourth DIRECTV Receiver is
            activated in connection with the conversion of an Eligible MMDS
            Subscriber under the Pegasus Digital One Plan and where Pegasus has
            specifically designated the Eligible MMDS Subscriber as being
            eligible for Third and Fourth DIRECTV Receivers.

            3. The following sentences shall be added to the end of Section 8.3
(b) of the Agreement.

                        "In addition, Pegasus will pay Nucentrix the additional
            Installation Incentive of "***" for the installation of each Third
            and Fourth DIRECTV Receiver (which receiver is contemporaneously
            activated with a Primary DIRECTV System) provided to an Eligible
            MMDS Subscriber who is activating service under the Pegasus Digital
            One Plan and who Pegasus has designated as being eligible for Third
            and Fourth DIRECTV Receivers.

            4. Schedule 1.1 is hereby replaced with Schedule 1.1 attached hereto
and made a part hereof.

            5. This Amendment is incorporated into the Agreement and made a part
thereof. All reference to the Agreement in any other document will refer to the
Agreement as modified by this Amendment. Except as modified by this Amendment,
all other terms, provisions and conditions of the Agreement shall remain in full
force and effect. The terms of this Amendment may not be changed or modified
except by written agreement of both parties. This Amendment may be executed in
counterparts, each of which are deemed an original, but all of which constitute
one and the same document.

         IN WITNESS WHEREOF, this Amendment has been executed by the parties
hereto as of the date first above written.

                             [SIGNATURES TO FOLLOW]

<PAGE>

PEGASUS SATELLITE TELEVISION, INC.

By:      /s/ Scott A. Blank
Name: Scott A. Blank
Title:   Senior Vice President

Address:
Pegasus Satellite Television, Inc.
c/o Pegasus Communications Management Company
225 City Line Avenue, Suite 200
Bala Cynwyd, PA  19004
Telecopy No.:     (610) 934-7072

NUCENTRIX BROADBAND NETWORKS, INC.

By:      /s/ Frank Hosea
Name:    Frank Hosea
Title:   Sr. VP Operations

Address:
Nucentrix Broadband Networks, Inc.
4120 International Parkway, Suite 2000
Carrollton, TX 75007
Telecopy No.: 972.662.3800<PAGE>
                                                                    EXHIBIT 10.1

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the filing of the Quarterly Report on Form 10-Q for the
quarter ended June 30, 2002, (the "Report") by Arkansas Best Corporation
("Registrant"), each of the undersigned hereby certifies that:

     1.   The Report fully complies with the requirements of section 13(a) or
          15(d) of the Securities Exchange Act of 1934, as amended, and

     2.   The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Registrant.

                                       ARKANSAS BEST CORPORATION
                                                  (Registrant)

Date:   August 9, 2002                 /s/ Robert A. Young III
                                       -----------------------------------------
                                       Robert A. Young III
                                       President & Chief Executive Officer

                                       ARKANSAS BEST CORPORATION
                                                  (Registrant)

Date:   August 9, 2002                 /s/ David E. Loeffler
                                       -----------------------------------------
                                       David E. Loeffler
                                       Vice President-Treasurer, Chief Financial
                                       Officer and Principal Accounting Officer<PAGE>
                                                                    EXHIBIT 10.1

                               PACKAGED ICE, INC.

                   2002 SENIOR EXECUTIVE RESTRICTED STOCK PLAN
                            (As Adopted May 16, 2002)

<PAGE>

         1. Purpose.

                The purpose of this Plan is to strengthen Packaged Ice, Inc, a
Texas corporation (the "Company"), by providing an incentive to selected senior
executive officers to devote their abilities and efforts to the success of the
Company's business enterprise in Fiscal Year 2002. It is intended that this
purpose be achieved by extending to such senior executives an added long-term
incentive for high levels of performance and unusual efforts through the grant
of Restricted Stock.

         2. Definitions.

                For purposes of this Plan:

                2.1 "Agreement" means the written agreement between the Company
and a Grantee evidencing the grant of an Award and setting forth the terms and
conditions thereof.

                2.2 "Award" means a grant of Restricted Stock.

                2.3 "Board" means the Board of Directors of the Company.

                2.4 "Cause" means: (i) intentional failure to perform reasonably
assigned duties, (ii) dishonesty or willful misconduct in the performance of
duties, (iii) involvement in a transaction in connection with the performance of
duties to the Company or any of its Subsidiaries which transaction is adverse to
the interests of the Company or any of its Subsidiaries and which is engaged in
for personal profit or (iv) willful violation of any law, rule or regulation in
connection with the performance of duties (other than traffic violations or
similar offenses).

                2.5 "Change in Capitalization" means any increase or reduction
in the number of Shares, or any change (including, but not limited to, a change
in value) in the Shares or exchange of Shares for a different number or kind of
shares or other securities of the Company or another corporation, by reason of a
reclassification, recapitalization, merger, consolidation, reorganization,
spin-off, split-up, issuance of warrants or rights or debentures, stock
dividend, stock split or reverse stock split, cash dividend, property dividend,
combination or exchange of shares, repurchase of shares, change in corporate
structure or otherwise.

                2.6 "Change in Control" means the occurrence during the term of
the Plan of:

                    (a) An acquisition (other than directly from the Company)
of any voting securities of the Company (the "Voting Securities") by any
"Person" (as the term person is used for purposes of Section 13(d) or 14(d) of
the Securities Exchange Act of 1934, as amended (the "Exchange Act")),
immediately after which such Person has "Beneficial Ownership" (within the
meaning of Rule 13d-3 promulgated under the Exchange Act) of twenty percent
(20%) or more of the then outstanding Shares or the combined voting power of the
Company's then outstanding Voting Securities; provided, however, in determining
whether a Change in Control has occurred, Shares or Voting Securities which are
acquired in a "Non-Control Acquisition" (as hereinafter defined) shall not
constitute an acquisition which would cause a Change in Control. A "Non-Control
Acquisition" shall mean an acquisition by (i) an employee benefit plan (or a
trust forming a part thereof) maintained by (A) the Company or (B) any
corporation or other Person of which a majority of its voting power or its
voting equity securities or equity interest is owned, directly or indirectly, by
the Company (for purposes of this definition, a "Subsidiary"), (ii) the Company
or its Subsidiaries, or (iii) any Person in connection with a "Non-Control
Transaction" (as hereinafter defined);

                    (b) The individuals who, as of May 9, 2001 are members of
the Board (the "Incumbent Board"), cease for any reason to constitute at least
two-thirds of the members of the Board; provided, however, that if the election,
or nomination for election by the Company's common stockholders, of any new
director was approved by a vote of at least two-thirds of the Incumbent Board,
such new director shall, for purposes of this Plan, be considered as a member of
the Incumbent Board; provided further, however, that no individual shall be
considered a member of the Incumbent Board if such individual initially assumed
office as a result of either an actual or threatened "Election Contest" (as
described in Rule 14a-11 promulgated under the Exchange Act) or other actual or
threatened solicitation of proxies or consents by or on behalf of a Person other
than the Board (a "Proxy Contest") including by reason of any agreement intended
to avoid or settle any Election Contest or Proxy Contest; or

                                       1
<PAGE>

                  (c) The consummation of:

                           (i) A merger, consolidation or reorganization with or
                  into the Company or in which securities of the Company are
                  issued, unless such merger, consolidation or reorganization is
                  a Non-Control Transaction. A "Non-Control Transaction" shall
                  mean a merger, consolidation or reorganization with or into
                  the Company or in which securities of the Company are issued
                  where:

                                    (A) the stockholders of the Company,
                           immediately before such merger, consolidation or
                           reorganization, own directly or indirectly
                           immediately following such merger, consolidation or
                           reorganization, at least fifty percent (50%) of the
                           combined voting power of the outstanding voting
                           securities of the corporation resulting from such
                           merger or consolidation or reorganization (the
                           "Surviving Corporation") in substantially the same
                           proportion as their ownership of the Voting
                           Securities immediately before such merger,
                           consolidation or reorganization,

                                    (B) the individuals who were members of the
                           Incumbent Board immediately prior to the execution of
                           the agreement providing for such merger,
                           consolidation or reorganization constitute at least
                           two-thirds of the members of the board of directors
                           of the Surviving Corporation, or a corporation
                           beneficially directly or indirectly owning a majority
                           of the Voting Securities of the Surviving
                           Corporation, and

                                    (C) no Person other than (i) the Company,
                           (ii) any Subsidiary, (iii) any employee benefit plan
                           (or any trust forming a part thereof) that,
                           immediately prior to such merger, consolidation or
                           reorganization, was maintained by the Company or any
                           Subsidiary, or (iv) any Person who, immediately prior
                           to such merger, consolidation or reorganization had
                           Beneficial Ownership of twenty percent (20%) or more
                           of the then outstanding Voting Securities or Shares,
                           has Beneficial Ownership of twenty percent (20%) or
                           more of the combined voting power of the Surviving
                           Corporation's then outstanding voting securities or
                           its common stock.

                              (ii) A complete liquidation or dissolution of the
                Company; or

                              (iii) The sale or other disposition of all or
                substantially all of the assets of the Company to any Person
                (other than a transfer to a Subsidiary).

                Notwithstanding the foregoing, a Change in Control shall not be
deemed to occur solely because any Person (the "Subject Person") acquired
Beneficial Ownership of more than the permitted amount of the then outstanding
Shares or Voting Securities as a result of the acquisition of Shares or Voting
Securities by the Company which, by reducing the number of Shares or Voting
Securities then outstanding, increases the proportional number of shares
Beneficially Owned by the Subject Persons, provided that if a Change in Control
would occur (but for the operation of this sentence) as a result of the
acquisition of Shares or Voting Securities by the Company, and after such share
acquisition by the Company, the Subject Person becomes the Beneficial Owner of
any additional Shares or Voting Securities which increases the percentage of the
then outstanding Shares or Voting Securities Beneficially Owned by the Subject
Person, then a Change in Control shall occur.

                                       2
<PAGE>
             If an Eligible Individual's employment is terminated by the
Company without Cause prior to the Determination Date, a Change in Control
occurs prior to the Determination Date, and the Eligible Individual reasonably
demonstrates that the termination (A) was at the request of a third party who
has indicated an intention or taken steps reasonably calculated to effect a
change in control or (B) otherwise arose in connection with, or in anticipation
of, a Change in Control which has been threatened or proposed, such termination
shall be deemed to have occurred after a Change in Control for purposes of this
Plan provided a Change in Control shall actually have occurred prior to the
Determination Date.

         2.7 "Code" means the Internal Revenue Code of 1986, as amended.

         2.8 "Committee" means a committee, as described in Section 3.1,
appointed by the Board from time to time to administer this Plan and to perform
the functions set forth herein.

         2.9 "Company" means Packaged Ice, Inc.

         2.10 "Determination Date" means the date on which the Committee
determines whether a Performance Goal has been met with respect to Fiscal Year
2002.

         2.11 "Director" means a director of the Company.

         2.12 "Disability" means:

                  (a) in the case of a Grantee whose employment with the Company
or a Subsidiary is subject to the terms of an employment agreement between such
Grantee and the Company or Subsidiary, which employment agreement includes a
definition of "Disability", the term "Disability" as used in this Plan or any
Agreement shall have the meaning set forth in such employment agreement during
the period that such employment agreement remains in effect; and

                  (b) in all other cases, the term "Disability" as used in this
Plan or any Agreement shall mean a physical or mental infirmity which impairs
the Grantee's ability to perform substantially his or her duties for a period of
one hundred eighty (180) consecutive days.

         2.13 "Eligible Individual" means any senior officer of the Company as
designated by the Compensation Committee.

         2.14 "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

         2.15 "Fair Market Value" on any date means the closing sales prices of
the Shares on the last trading day prior to such date on the principal national
securities exchange on which such Shares are listed or admitted to trading, or,
if such Shares are not so listed or admitted to trading, the average of the per
Share closing bid price and per Share closing asked price on such prior day as
quoted on the National Association of Securities Dealers Automated Quotation
System or such other market in which such prices are regularly quoted, or, if
there have been no published bid or asked quotations with respect to Shares on
such prior day, the Fair Market Value shall be the value established by the
Board in good faith.

         2.16 "Fiscal Year" means the Company's fiscal year.

         2.17 "Grantee" means a person to whom an Award has been granted under
this Plan.

         2.18 "Nonemployee Director" means a director of the Company who is a
"nonemployee director" within the meaning of Rule 16b-3 promulgated under the
Exchange Act.

         2.19 "Performance Goal" means a performance goal established by the
Committee with respect to Fiscal Year 2002. The Committee may require that
either one or more Performance Goals, or that one of one or more alternative
Performance Goals must be met for Award restrictions to lapse.

                                       3
<PAGE>

         2.20 "Restricted Period" means the period designated by the Committee
during which Restricted Stock may not be sold, assigned, pledged or otherwise
encumbered.

         2.21 "Restricted Stock" means Shares issued or transferred to an
Eligible Individual pursuant to Section 5.

         2.22 "Retained Distribution" means any securities or other property
(other than regular cash dividends) distributed by the Company in respect of
Restricted Stock during any Restricted Period.

         2.23 "Shares" means the common stock, par value $.01 per share, of the
Company.

         2.24 "Subsidiary" means any entity, whether or not incorporated, in
which the Company directly or indirectly owns 50% or more of the outstanding
equity or other ownership interests.

      3. Administration.

         3.1 This Plan shall be administered by the Committee, which shall hold
meetings at such times as may be necessary for the proper administration of this
Plan. The Committee shall keep minutes of its meetings. A quorum shall consist
of not fewer than two (2) members of the Committee and a majority of a quorum
may authorize any action. Any decision or determination reduced to writing and
signed by a majority of all of the members of the Committee shall be as fully
effective as if made by a majority vote at a meeting duly called and held. The
Committee shall consist of two (2) or more Directors and may consist of the
entire Board. If the Committee consists of less than the entire Board, then with
respect to any Award to an individual who is subject to Section 16 of the
Exchange Act, the Committee shall consist of at least two (2) Directors, each of
whom shall be a Nonemployee Director. For purposes of the preceding sentence, if
one or more members of the Committee is not a Nonemployee Director, but recuses
himself or herself or abstains from voting with respect to a particular action
taken by the Committee, then the Committee, with respect to that action, shall
be deemed to consist only of the members of the Committee who have not recused
themselves or abstained from voting. Subject to applicable law, the Committee
may delegate its authority under this Plan to any other person or persons.

         3.2 No member of the Committee shall be liable for any action, failure
to act, determination or interpretation made in good faith with respect to this
Plan or any transaction hereunder. The Company hereby agrees to indemnify each
member of the Committee for all costs and expenses and, to the extent permitted
by applicable law, any liability incurred in connection with defending against,
responding to, negotiating for the settlement of or otherwise dealing with any
claim, cause of action or dispute of any kind arising in connection with any
actions in administering this Plan or in authorizing or denying authorization to
any transaction hereunder.

         3.3 Subject to the express terms and conditions set forth herein, the
Committee shall have the power from time to time to:

             (a) select those Eligible Individuals to whom Awards shall be
granted under this Plan and to determine the number of Shares in respect of
which each Award is granted, the terms and conditions (which need not be
identical) of each such Award, and make any amendment or modification to any
Award Agreement consistent with the terms of this Plan;

             (b) to construe and interpret this Plan and the Awards granted
hereunder and to establish, amend and revoke rules and regulations for the
administration of this Plan, including, but not limited to, correcting any
defect or supplying any omission, or reconciling any inconsistency in this Plan
or in any Agreement, in the manner and to the extent it shall deem necessary or
advisable, including so that this Plan and the operation of this Plan complies
with Rule 16b-3 under the Exchange Act, the Code, to the extent applicable, and
other applicable law, and otherwise to make this Plan fully effective. All
decisions and determinations by the Committee in the exercise of this power
shall be final, binding and conclusive upon the Company, its Subsidiaries, and
Grantees, and all other persons having any interest therein;

                                       4
<PAGE>

             (c) to determine the duration and purposes for leaves of absence
which may be granted to a Grantee on an individual basis without constituting a
termination of employment or service for purposes of this Plan;

             (d) to exercise its discretion with respect to the powers and
rights granted to it as set forth in this Plan; and

             (e) generally, to exercise such powers and to perform such acts as
are deemed necessary or advisable to promote the best interests of the Company
with respect to this Plan.

     4. Stock Subject to this Plan; Grant Limitations.

           4.1 The maximum number of Shares that may be made the subject of
Awards granted under this Plan is 200,000. The Company shall reserve for the
purposes of the Plan, out of its authorized but unissued Shares or out of Shares
held in the Company's treasury, or partly out of each, such number of Shares as
shall be determined by the Board.

           4.2 Upon the granting of an Award, the number of Shares available
under Section 4.1 for the granting of further Awards shall be reduced by the
number of Shares in respect of which the Award is granted.

           4.3 Whenever any outstanding Award or portion thereof expires, is
canceled, is forfeited, or is otherwise terminated for any reason without the
restrictions governing some or all of the Shares covered thereby having lapsed,
the Shares allocable to the expired, canceled, forfeited, or otherwise
terminated portion of the Award may again be the subject of Awards granted
hereunder.

     5. Restricted Stock.

           5.1 Grant. The Committee may grant Awards to Eligible Individuals,
each of which shall be evidenced by an Agreement between the Company and the
Grantee. Each Agreement shall contain such restrictions, terms and conditions as
the Committee may, in its discretion, determine and (without limiting the
generality of the foregoing) such Agreements may require that an appropriate
legend be placed on Share certificates. Awards of Restricted Stock shall be
subject to the terms and provisions set forth below in this Section 5.

           5.2 Rights of Grantee. Shares of Restricted Stock granted pursuant
to an Award hereunder shall be issued in the name of the Grantee as soon as
reasonably practicable after the Award is granted provided that the Grantee has
executed an Agreement evidencing the Award, the appropriate blank stock powers
and, in the discretion of the Committee, an escrow agreement and any other
documents which the Committee may require as a condition to the issuance of such
Shares. If a Grantee shall fail to execute the Agreement evidencing a Restricted
Stock Award, or any documents which the Committee may require within the time
period prescribed by the Committee at the time the Award is granted, the Award
shall be null and void. At the discretion of the Committee, Shares issued in
connection with a Restricted Stock Award shall be deposited together with the
stock powers with an escrow agent (which may be the Company) designated by the
Committee. Unless the Committee determines otherwise and as set forth in the
Agreement, upon delivery of the Shares to the escrow agent, the Grantee shall
have all of the rights of a stockholder with respect to such Shares, including
the right, when the restrictions lapse, to receive all dividends or other
distributions paid or made with respect to the Shares, but excluding the right
to vote the Shares. The Company shall retain custody of all Retained
Distributions made or declared with respect to the Restricted Stock and such
Retained Distributions shall be subject to the same restrictions on terms and
conditions as are applicable to the Restricted Stock.

           5.3 Non-transferability. Until all restrictions upon the Shares of
Restricted Stock awarded to a Grantee shall have lapsed in the manner set forth
in Section 5.4, such Shares and Retained Distribution shall not be sold,
transferred or otherwise disposed of and shall not be pledged or otherwise
hypothecated.

                                       5
<PAGE>

        5.4 Lapse of Restrictions.

               (a) Generally. Restrictions upon Shares of Restricted Stock
awarded hereunder shall lapse only if, with respect to Fiscal Year 2002, the
Performance Goal established by the Committee has been met by the last day of
Fiscal Year 2002. If such Performance Goal has been met, the restrictions will
lapse on the Determination Date. If the Committee determines that the
Performance Goal has not been met, all outstanding Shares of Restricted Stock
shall immediately be forfeited.

               (b) Effect of Change in Control. The restrictions upon Shares of
Restricted Stock covered by all outstanding Awards shall lapse immediately prior
to a Change in Control that occurs prior to the Determination Date.

           5.5 Treatment of Dividends. Payment to the Grantee of dividends shall
be (a) deferred until the lapsing of the restrictions imposed upon the
Restricted Stock and (b) held by the Company for the account of the Grantee
until such time. Deferred dividends are to be reinvested in Shares (which shall
be held as additional Shares of Restricted Stock). Payment of deferred dividends
in respect of Shares of Restricted Stock shall be made upon the lapse of
restrictions imposed on the Shares in respect of which the deferred dividends
were paid, and any dividends deferred in respect of any Shares of Restricted
Stock shall be forfeited upon the forfeiture of such Shares.

           5.6 Delivery of Shares. Upon the lapse of the restrictions on Shares
of Restricted Stock, the Committee shall cause a stock certificate to be
delivered to the Grantee with respect to such Shares, free of all restrictions
hereunder.

        6. Effect of a Termination of Employment.

           6.1 Generally. If a Grantee's employment with the Company is
terminated for any reason other than death or Disability prior to the
Determination Date, the Award shall be terminated and the Restricted Stock shall
be forfeited; provided, however, that the Committee may, at any time, amend an
Award to provide that the Award will not terminate upon such a termination.

           6.2 Death or Disability. If a Grantee's employment with the Company
is terminated for death or Disability at any time prior to the Determination
Date, the Award shall remain outstanding until a determination has been made as
to whether a Performance Goal has been met. If the Performance Goal has been
met, the restrictions on all Shares of Restricted Stock shall lapse, and if it
has not been met, the Award shall be terminated and the Restricted Stock shall
be forfeited.

        7. Adjustment Upon Changes in Capitalization.

           7.1 Generally. In the event of a Change in Capitalization, the
Committee shall conclusively determine the appropriate adjustments, if any, to
(i) the maximum number, exercise price and class of Shares or other stock or
securities with respect to which Awards may be granted under this Plan, and (ii)
the number, exercise price and class of Shares or other stock or securities
which are subject to outstanding Awards granted under this Plan.

           7.2 Continuation of Restrictions. If, by reason of a Change in
Capitalization, a Grantee of an Award shall be entitled to new, additional or
different shares of stock or securities of the Company or any other corporation,
such new, additional or different shares shall thereupon be subject to all of
the conditions, restrictions and performance criteria which were applicable to
the Shares subject to the Award prior to such Change in Capitalization.

        8. Effect of Certain Transactions.

           Subject to Sections 5.4(b), or as otherwise provided in an Agreement,
in the event of (a) the liquidation or dissolution of the Company or (b) a
merger or consolidation of the Company (a "Transaction"), this Plan and the
Awards issued hereunder shall continue in effect in accordance with their
respective terms, except that following a Transaction either (i) each
outstanding Award shall be treated as provided for in the agreement entered into
in connection with the Transaction or (ii) if not so provided in such agreement,
each Grantee shall be entitled to

                                       6
<PAGE>

receive in respect of each Share subject to any outstanding Awards, as the case
may be, upon transfer in respect of any Award, the same number and kind of
stock, securities, cash, property or other consideration that each holder of a
Share was entitled to receive in the Transaction in respect of a Share;
provided, however, that such stock, securities, cash, property or other
consideration shall remain subject to all of the conditions, restrictions and
performance criteria which were applicable to the Awards prior to such
Transaction.

           9. Rule 16b-3.

                  This Plan is intended to comply with Rule 16b-3 promulgated
under the Exchange Act and the Committee shall interpret and administer the
provisions of this Plan or any Agreement in a manner consistent therewith. Any
provisions inconsistent with such Rule shall be inoperative and shall not affect
the validity of this Plan.

           10. Termination and Amendment of this Plan or Modification of Awards.

                  10.1 Plan Amendment or Termination. This Plan shall terminate
on the day following the Determination Date and the Grantees have been notified
of the status of their Awards. If the Performance Goal has not been met, all
Awards hereunder shall be cancelled and all Shares of Restricted Stock shall be
immediately forfeited. If the Performance Goal has been met, all restrictions
with respect to all Shares covered by outstanding Awards shall immediately
lapse. No Awards may be granted after June 30, 2002. The Board may sooner
terminate this Plan and the Board may at any time and from time to time amend,
modify or suspend this Plan; provided, however, that:

                       (a) no such amendment, modification, suspension or
termination shall impair or adversely alter any Awards theretofore granted under
this Plan, except with the consent of the Grantee, nor shall any amendment,
modification, suspension or termination deprive any Grantee of any Shares which
he or she may have acquired through or as a result of this Plan; and

                       (b) to the extent necessary under any applicable law,
regulation or exchange requirement, no amendment shall be effective unless
approved by the stockholders of the Company in accordance with applicable law,
regulation or exchange requirement.

                  10.2 Modification of Awards. No modification of an Award shall
adversely alter or impair any rights or obligations under the Award without the
consent of the Grantee, as the case may be.

            11. Non-Exclusivity of this Plan.

                  The adoption of this Plan by the Board shall not be construed
as amending, modifying or rescinding any previously approved incentive
arrangement or as creating any limitations on the power of the Board to adopt
such other incentive arrangements as it may deem desirable.

            12. Limitation of Liability.

                  As illustrative of the limitations of liability of the
Company, but not intended to be exhaustive thereof, nothing in this Plan shall
be construed to:

                       (a) give any person any right to be granted an Award
other than at the sole discretion of the Committee;

                       (b) give any person any rights whatsoever with respect to
Shares except as specifically provided in this Plan;

                       (c) limit in any way the right of the Company or any
Subsidiary to terminate the employment of any person at any time; or

                       (d) be evidence of any agreement or understanding,
expressed or implied, that the Company will employ any person at any particular
rate of compensation or for any particular period of time.

                                       7
<PAGE>

           13. Regulations and Other Approvals; Governing Law.

                  13.1 Except as to matters of federal law, this Plan and the
rights of all persons claiming hereunder shall be construed and determined in
accordance with the laws of the State of Texas without giving effect to
conflicts of laws principles thereof.

                  13.2 The obligation of the Company to deliver Shares with
respect to Awards granted under this Plan shall be subject to all applicable
laws, rules and regulations, including all applicable federal and state
securities laws, and the obtaining of all such approvals by governmental
agencies as may be deemed necessary or appropriate by the Committee.

                  13.3 Each Award is subject to the requirement that, if at any
time the Committee determines, in its discretion, that the listing, registration
or qualification of Shares issuable pursuant to this Plan is required by any
securities exchange or under any state or federal law, or the consent or
approval of any governmental regulatory body is necessary or desirable as a
condition of, or in connection with, the grant of an Award or the issuance of
Shares, no Awards shall be granted or Shares issued, in whole or in part, unless
listing, registration, qualification, consent or approval has been effected or
obtained free of any conditions as acceptable to the Committee.

                  13.4 Notwithstanding anything contained in this Plan or any
Agreement to the contrary, in the event that the disposition of Shares acquired
pursuant to this Plan is not covered by a then current registration statement
under the Securities Act of 1933, as amended (the "Securities Act"), and is not
otherwise exempt from such registration, such Shares shall be restricted against
transfer to the extent required by the Securities Act and Rule 144 or other
regulations thereunder. The Committee may require any individual receiving
Shares pursuant to an Award granted under this Plan, as a condition precedent to
receipt of such Shares, to represent and warrant to the Company in writing that
the Shares acquired by such individual are acquired without a view to any
distribution thereof and will not be sold or transferred other than pursuant to
an effective registration thereof under the Securities Act or pursuant to an
exemption applicable under said Act or the rules and regulations promulgated
thereunder. The certificates evidencing any of such Shares shall be
appropriately amended or have an appropriate legend placed thereon to reflect
their status as restricted securities as aforesaid.

           14. Miscellaneous.

                  14.1 Taxes.

                       (a) Withholding Taxes. At such times as a Grantee
recognizes taxable income in connection with the receipt of Shares or cash
hereunder (a "Taxable Event"), the Grantee shall pay to the Company an amount
equal to (but not in excess of) the federal, state and local income taxes and
other amounts as may be required by law to be withheld by the Company in
connection with the Taxable Event (the "Withholding Taxes") prior to the
issuance, or release from escrow, of such Shares or the payment of such cash.
The Company shall have the right to deduct from any payment of cash to a Grantee
an amount equal to the Withholding Taxes in satisfaction of the obligation to
pay Withholding Taxes. The Committee may provide in the Agreement at the time of
grant, or at any time thereafter, that the Grantee, in satisfaction of the
obligation to pay Withholding Taxes to the Company, may elect to have withheld a
portion of the Shares then issuable to him or her having an aggregate Fair
Market Value equal to the Withholding Taxes.

                       (b) Section 83(b) Taxes and Gross-Up. Should a Grantee
elect to make a proper Section 83(b) election during the period permitted by
law, the Company shall provide the Grantee one or more payments, as necessary,
in the aggregate equal to the amount necessary to pay the taxes due as a result
of such election and an additional gross-up amount so that after all taxes with
respect to the Award are paid, Grantee will retain the same after-tax income
that he would have retained had no Award been granted and no Section 83(b)
election made.

                       (c) Effective Date. The effective date of this Plan
shall be May 16, 2002.

                                       8

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