Document:

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                                                                     EXHIBIT 4.1

                                LANDACORP, INC.

                          REGISTRATION RIGHTS AGREEMENT

        This Registration Rights Agreement (the "Agreement") is made as of this
31st day of October, 2000, by and among Landacorp, Inc., a Delaware corporation
(the "Company") and each of the undersigned holders (each a "Holder" and
together the "Holders").

                                 R E C I T A L S

        A. The Company and PatientCentrix, Inc. ("PCI") have entered into an
Agreement and Plan of Merger dated of even date herewith (the "Merger
Agreement") pursuant to which the Company has agreed to acquire the business and
assets of PCI.

        B. A condition under the Merger Agreement is that the Company and the
Holders enter into this Agreement in order to provide the Holders with certain
rights to register the common stock of the Company ("Company Common Stock")
acquired by the Holders pursuant to the Merger Agreement, as well as the Company
Common Stock subject to options assumed by the Company pursuant to the Merger
Agreement.

        NOW, THEREFORE, the parties hereby agree as follows:

                                    AGREEMENT

        1. Registration Rights. The Company and the Holders covenant and agree
as follows:

                1.1 Definitions. For purposes of this Section 1:

                        (a) The terms "register," "registered," and
"registration" refer to a registration effected by preparing and filing a
registration statement or similar document in compliance with the Securities Act
of 1933, as amended (the "Securities Act"), and the declaration or ordering of
effectiveness of such registration statement or document;

                        (b) The term "Registrable Securities" means (i) the
shares of Company Common Stock issued in connection with the Merger Agreement
and (ii) the shares of Company Common Stock underlying options assumed by the
Company pursuant to the Merger Agreement (such shares of Company Common Stock
are collectively referred to herein as the "Shares" or "Stock"); provided, that
the foregoing definition shall exclude in all cases any Registrable Securities
sold by a person in a transaction in which his or her rights under this
Agreement are not assigned. Notwithstanding the foregoing, shares of Company
Common Stock issued to the Holders shall only be treated as Registrable
Securities if and so long as they have not been (x) sold to or through a broker
or dealer or underwriter in a public distribution or a public securities
transaction, or (y) sold in a transaction exempt from the registration and
prospectus delivery requirements under Section 4(1) of the Securities Act so
that all transfer restrictions, and restrictive legends with respect thereto, if
any, are removed upon the consummation of such sale;

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                        (c) The number of shares of "Registrable Securities then
outstanding" shall be determined by the number of shares of Company Common Stock
then outstanding which are Registrable Securities, plus the number of shares of
Company common stock issuable pursuant to then exercisable or convertible
securities which are Registrable Securities;

                        (d) The term "Shareholder Representative" shall have the
meaning ascribed to it in the Merger Agreement.

                        (e) The term "Holder" means any person owning or having
the right to acquire Registrable Securities or any assignee thereof in
accordance with this Agreement;

                        (f) The term "Form S-3" means such form under the
Securities Act as in effect on the date hereof or any successor form under the
Securities Act; and

                        (g) The term "SEC" means the Securities and Exchange
Commission.

                1.2 Demand Registration. If the Holders of more than 50% of
Registrable Securities under this Agreement request that the Company file a
registration statement on Form S-3, the Company shall (i) promptly give to each
Holder written notice thereof, and (ii) use reasonable best efforts to effect a
registration to permit the sale of the Registrable Securities by the Holders
making the request, as well as all the Registrable Securities specified in a
written request or requests, made within fifteen (15) days after receipt of such
written notice from the Company, by any other Holder.

                        (a) as soon as practicable, but in no event more than 30
days after receipt of such request, prepare and file (and use reasonable efforts
to have declared effective by the SEC), a registration statement on Form S-3
relating to resale of all of the shares of the Registrable Securities and use
reasonable efforts to cause such registration statement to remain continuously
effective for a period which will terminate when all Registrable Securities
covered by such registration statement, as amended from time to time, have been
sold or when the Registrable Securities by the Shareholders Representative and
the Holders of Registrable Securities represented may be sold without
restriction under Rule 144(k) under the Securities Act;

                        (b) prepare and file with the SEC such amendments and
post-effective amendments to the registration statement as may be necessary to
keep such registration statement effective for the period specified in Section
1.2(a) and to comply with the provisions of the Securities Act and the
Securities Exchange Act of 1934, as amended (the "Exchange Act") with respect to
the distribution of all Registrable Securities;

                        (c) notify each Holder promptly and confirm such notice
in writing (i) when the registration statement or any post-effective amendment
has become effective, (ii) of any request by the SEC for amendments or
supplements to the registration statement or for additional information, (iii)
of the issuance by the SEC of any stop order suspending the effectiveness of the
registration statement or the initiation of any proceedings for that purpose,
and (iv) of the receipt by the Company of any notification with respect to the
suspension of the qualification of the Registrable

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Securities for sale in any jurisdiction or the initiation or threatening of any
proceeding for such purpose;

                        (d) use reasonable efforts to obtain the withdrawal of
any order suspending the effectiveness of the registration statement at the
earliest possible moment;

                        (e) furnish to each Holder, without charge, at least one
copy of the registration statement and any post-effective amendment thereto,
including financial statements and schedules, and upon an Holder's request, all
documents incorporated therein by reference and all exhibits thereto (including
those incorporated by reference);

                        (f) cause all Registrable Securities covered by the
registration statement to be listed on each securities exchange or market on
which similar securities issued by the Company are then listed, and if the
securities are not so listed to use its reasonable best efforts promptly to
cause all such securities to be listed on either the New York Stock Exchange,
the American Stock Exchange or the Nasdaq Stock Market;

                        (g) use reasonable efforts to qualify or register the
Registrable Securities for sale under (or obtain exemptions from the application
of) the Blue Sky laws of such jurisdictions as are applicable. The Company shall
not be required to qualify as a foreign corporation or to file a general consent
to service of process in any such jurisdiction where it is not presently
qualified or where it would be subject to general service of process or taxation
as a foreign corporation in any jurisdiction where it is not now so subject;

                        (h) otherwise use reasonable efforts to comply with all
applicable rules and regulations of the SEC under the Securities Act and the
Exchange Act and take such other actions as may be reasonably necessary to
facilitate the registration of the Registrable Securities hereunder; and

                        (i) expenses incurred in connection with a registration
requested pursuant to this Section 1.2 shall be borne by the Company, including
all registration, filing, qualification, printers' and accounting fees and
attorney's fees for one counsel to the selling Holders, but excluding any
underwriters' discounts or commissions (such discounts or commissions, if any,
to be borne pro rata by the Holders participating in the registration);

provided, that the Company shall not be obligated to take any action to effect
any such registration, qualification or compliance pursuant to this section 1.2
(i) prior to February 8, 2001, and (ii) unless the average closing price for one
share of the Company's common stock, as quoted on the Nasdaq Stock Market, for
the ten (10) days prior to such demand, exceeds $7.00 (subject to adjustment for
stock splits, stock dividends, combinations or other similar recapitalizations
affecting shares of Company common stock); and, provided further, the Company
shall not be obligated to effect such registration, qualification or compliance
pursuant to this section 1.2 more than once.

                1.3 Piggyback Registration.

                        (a) Notice of Registration. If at any time or from time
to time the Company shall determine to register any of its securities, either
for its own account or the account of

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a security holder or holders, other than a registration relating solely to
employee benefit plans, a registration relating solely to a Commission Rule 145
transaction, or a registration pursuant to Section 1.2 hereof, the Company shall
(i) promptly give to each Holder written notice thereof, and (ii) include in
such registration (and any related qualification under blue sky laws or other
compliance), and in any underwriting involved therein, all the Registrable
Securities specified in a written request or requests, made within fifteen (15)
days after receipt of such written notice from the Company, by any Holder.

                        (b) Underwriting. If the registration of which the
Company gives notice is for a registered public offering involving an
underwriting, the Company shall so advise the Holders as a part of the written
notice given pursuant to 1.2(c). In such event the right of any Holder to
registration pursuant to this Section 1.3 shall be conditioned upon such
Holder's participation in such underwriting and the inclusion of Registrable
Securities in the underwriting to the extent provided herein. All Holders
proposing to distribute their securities through such underwriting shall
(together with the Company) enter into an underwriting agreement in customary
form with the managing underwriter selected for such underwriting by the
Company. Notwithstanding any other provision of this Section 1.3, if the
managing underwriter or Company determines that marketing factors require a
limitation of the number of shares to be underwritten, the managing underwriter
may limit or completely exclude the Registrable Securities and other securities
to be distributed through such underwriting, provided, however, that Holders
shall only be so limited or excluded if all other holders seeking to register
securities are likewise limited or excluded. The Company shall so advise all
Holders distributing their securities through such underwriting of such
limitation or exclusion, and the number of shares of Registrable Securities that
may be included in the registration and underwriting shall be allocated (if
applicable) among all such Holders in proportion, as nearly as practicable, to
the respective amounts of Registrable Securities held by such Holders at the
time of filing the registration statement. To facilitate the allocation of
shares in accordance with the above provisions, the Company may round the number
of shares allocated to any Holder or holder to the nearest 100 shares.

        If any Holder disapproves of the terms of any such underwriting, such
Holder may elect to withdraw therefrom by written notice to the Company and the
managing underwriter. If shares are withdrawn from registration, the Company
shall offer to all persons retaining the right to include securities in the
registration the right to include additional securities in the registration,
with such shares being allocated among all such Holders in proportion, as nearly
as practicable, to the respective amounts of Registrable Securities held by such
Holders at the time of filing the registration statement.

                        (c) Right to Terminate Registration. The Company shall
have the right to terminate or withdraw any registration initiated by it under
this Section 1.3 prior to the effectiveness of such registration whether or not
any Holder has elected to include securities in such registration. The
Registration Expenses of such withdrawn registration shall be borne by the
Company.

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                1.4 Representations of Holders; Information for Use in
Registration Statement.

                        (a) Each Holder hereby represents to and covenants with
the Company that, during the period in which a registration statement effected
pursuant to Section 1.2 remains effective, such Holder will:

                                (i) not engage in any stabilization activity in
connection with any of the Company's securities;

                                (ii) cause to be furnished to any purchaser of
the Shares and to the broker-dealer, if any, through whom Shares may be offered,
a copy of the investor information materials provided by the Company; and

                                (iii) not bid for or purchase any securities of
the Company or any rights to acquire the Company's securities, or attempt to
induce any person to purchase any of the Company's securities or any rights to
acquire the Company's securities other than as permitted under the Exchange Act.

                        (b) Each Holder represents and warrants to the Company
that such Holder has completed the information requested by the Selling Holder's
Questionnaire attached as Exhibit A to this Agreement (the "Questionnaire"), and
further represents and warrants to the Company that all information provided by
such Holder in the Questionnaire is true, accurate and complete in all material
respects. Each Holder understands that the written information in the
Questionnaire and all written representations made in this Agreement are being
provided to the Company specifically for use in, or in connection with, the
registration statement, and has executed this Agreement with such knowledge.

                1.5 Furnish Information. It shall be a condition precedent to
the obligations of the Company to take any action pursuant to this Section 1
with respect to the Registrable Securities of any selling Holder that such
Holder shall furnish to the Company such information regarding itself, the
Registrable Securities held by it, and the intended method of disposition of
such securities as shall be required to effect the registration of such Holder's
Registrable Securities.

                1.6 Delay of Registration. No Holder shall have any right to
obtain or seek an injunction restraining or otherwise delaying any such
registration as the result of any dispute that might arise with respect to the
interpretation or implementation of this Section 1.

                1.7 Indemnification. In the event any Registrable Securities are
included in a registration statement under this Section 1:

                        (a) To the extent permitted by law, the Company will
indemnify and hold harmless each Holder, any underwriter (as defined in the
Securities Act) for such Holder and each person, if any, who controls such
Holder or underwriter within the meaning of the Securities Act or the Exchange
Act, against any losses, claims, damages, or liabilities (joint or several) to
which they may become subject under the Securities Act, the Exchange Act or
other federal or state law, insofar as such losses, claims, damages, or
liabilities (or actions in respect thereof) arise out of or are based upon any
of the following statements, omissions or violations (collectively a
"Violation"): (i) any

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untrue statement or alleged untrue statement of a material fact contained in
such registration statement, including any preliminary prospectus or final
prospectus contained therein or any amendments or supplements thereto, (ii) the
omission or alleged omission to state therein a material fact required to be
stated therein, or necessary to make the statements therein not misleading, or
(iii) any violation or alleged violation by the Company of the Securities Act,
the Exchange Act, any state securities law or any rule or regulation promulgated
under the Securities Act, the Exchange Act or any state securities law; and the
Company will pay to each such Holder, underwriter or controlling person, as
incurred, any legal or other expenses reasonably incurred by them in connection
with investigating or defending any such loss, claim, damage, liability, or
action; provided, however, that the indemnity agreement contained in this
subsection 1.6(a) shall not apply to amounts paid in settlement of any such
loss, claim, damage, liability, or action if such settlement is effected without
the consent of the Company (which consent shall not be unreasonably withheld),
nor shall the Company be liable in any such case for any such loss, claim,
damage, liability, or action to the extent that it arises out of or is based
upon a Violation which occurs in reliance upon and in conformity with written
information furnished expressly for use in connection with such registration by
any such Holder, underwriter or controlling person.

                        (b) To the extent permitted by law, each selling Holder
will indemnify and hold harmless the Company, each of its directors, each of its
officers who has signed the registration statement, each person, if any, who
controls the Company within the meaning of the Securities Act, any underwriter,
any other Holder selling securities in such registration statement and any
controlling person of any such underwriter or other Holder, against any losses,
claims, damages, or liabilities (joint or several) to which any of the foregoing
persons may become subject, under the Securities Act, the Exchange Act or other
federal or state law, insofar as such losses, claims, damages, or liabilities
(or actions in respect thereto) arise out of or are based upon any Violation, in
each case to the extent (and only to the extent) that such Violation occurs in
reliance upon and in conformity with written information furnished by such
Holder expressly for use in connection with such registration; and each such
Holder will pay, as incurred, any legal or other expenses reasonably incurred by
any person intended to be indemnified pursuant to this subsection 1.6(b), in
connection with investigating or defending any such loss, claim, damage,
liability, or action; provided, however, that the indemnity agreement contained
in this subsection 1.6(b) shall not apply to amounts paid in settlement of any
such loss, claim, damage, liability or action if such settlement is effected
without the consent of the Holder, which consent shall not be unreasonably
withheld; provided, that, in no event shall any indemnity under this subsection
1.6(b) exceed the net proceeds from the offering received by such Holder, except
in the case of willful fraud by such Holder.

                        (c) Promptly after receipt by an indemnified party under
this Section 1.6 of notice of the commencement of any action (including any
governmental action), such indemnified party will, if a claim in respect thereof
is to be made against any indemnifying party under this Section 1.6, deliver to
the indemnifying party a written notice of the commencement thereof and the
indemnifying party shall have the right to participate in, and, to the extent
the indemnifying party so desires, jointly with any other indemnifying party
similarly noticed, to assume the defense thereof with counsel mutually
satisfactory to the parties; provided, however, that an indemnified party
(together with all other indemnified parties which may be represented without
conflict by one counsel) shall have the right to retain one separate counsel,
with the reasonable fees and expenses to be paid by the indemnifying party, if
representation of such indemnified party by the counsel

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retained by the indemnifying party would be inappropriate due to actual or
potential differing interests between such indemnified party and any other party
represented by such counsel in such proceeding. The failure to deliver written
notice to the indemnifying party within a reasonable time of the commencement of
any such action, if prejudicial to its ability to defend such action, shall
relieve such indemnifying party of any liability to the indemnified party under
this Section 1.6, but the omission so to deliver written notice to the
indemnifying party will not relieve it of any liability that it may have to any
indemnified party otherwise than under this Section 1.6.

                        (d) If the indemnification provided for in this Section
1.6 is held by a court of competent jurisdiction to be unavailable to an
indemnified party with respect to any loss, liability, claim, damage, or expense
referred to therein, then the indemnifying party, in lieu of indemnifying such
indemnified party hereunder, shall contribute to the amount paid or payable by
such indemnified party as a result of such loss, liability, claim, damage, or
expense in such proportion as is appropriate to reflect the relative fault of
the indemnifying party on the one hand and of the indemnified party on the other
in connection with the statements or omissions that resulted in such loss,
liability, claim, damage, or expense as well as any other relevant equitable
considerations; provided that, in no event shall any contribution by a Holder
under this Subsection 1.6(d) exceed the net proceeds from the offering received
by such Holder, except in the case of willful fraud by such Holder. The relative
fault of the indemnifying party and of the indemnified party shall be determined
by reference to, among other things, whether the untrue or alleged untrue
statement of a material fact or the omission to state a material fact relates to
information supplied by the indemnifying party or by the indemnified party and
the parties' relative intent, knowledge, access to information, and opportunity
to correct or prevent such statement or omission.

                        (e) The obligations of the Company and Holders under
this Section 1.6 shall survive the completion of any offering of Registrable
Securities in a registration statement under this Section 1.

                1.8 Reports Under Securities Exchange Act of 1934. With a view
to making available to the Holders the benefits of Rule 144 and any other rule
or regulation of the SEC that may at any time permit a Holder to sell securities
of the Company to the public without registration or pursuant to a registration
on Form S-3, the Company agrees to:

                        (a) make and keep public information available, as those
terms are understood and defined in Rule 144, so long as the Company remains
subject to the periodic reporting requirements under Sections 13 or 15(d) of the
Exchange Act;

                        (b) take such action, including the voluntary
registration of its common stock under Section 12 of the Exchange Act, as is
necessary to enable the Holders to utilize Form S-3 for the sale of their
Registrable Securities;

                        (c) file with the SEC in a timely manner all reports and
other documents required of the Company under the Securities Act and the
Exchange Act; and

                        (d) furnish to any Holder, so long as the Holder owns
any Registrable Securities, forthwith upon request (i) a written statement by
the Company that it has complied with

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the reporting requirements of the Exchange Act and the rules and regulations
promulgated thereunder, or that it qualifies as a registrant whose securities
may be resold pursuant to Form S-3, (ii) a copy of the most recent annual or
quarterly report of the Company and such other reports and documents so filed by
the Company, and (iii) such other information as may be reasonably requested in
availing any Holder of any rule or regulation of the SEC which permits the
selling of any such securities without registration or pursuant to such form.

        2. Miscellaneous.

                2.1 Successors and Assigns. Except as otherwise provided in this
Agreement, the terms and conditions of this Agreement shall inure to the benefit
of and be binding upon the respective successors and assigns of the parties
(including transferees of any of the Shares). Nothing in this Agreement, express
or implied, is intended to confer upon any party other than the parties hereto
or their respective successors and assigns any rights, remedies, obligations, or
liabilities under or by reason of this Agreement, except as expressly provided
in this Agreement.

                2.2 Governing Law. This Agreement and all acts and transactions
pursuant hereto shall be governed, construed and interpreted in accordance with
the laws of the State of California, without giving effect to principles of
conflicts of laws.

                2.3 Counterparts. This Agreement may be executed in two (2) or
more counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

                2.4 Titles and Subtitles. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

                2.5 Notices. Unless otherwise provided herein, any notice
required or permitted by this Agreement shall be in writing and shall be deemed
sufficient upon delivery, when delivered personally or by overnight courier and
addressed to the party to be notified at such party's address as set forth on
the signature page hereto or as subsequently modified by written notice. In the
event that any date provided for in this Agreement falls on a Saturday, Sunday
or legal holiday, such date shall be deemed extended to the next business day.
Notwithstanding the foregoing, any notice delivered pursuant to Section 1.4
hereto must be made by personal delivery or confirmed facsimile transmission.

                2.6 Expenses. If any action at law or in equity is necessary to
enforce or interpret the terms of this Agreement, the prevailing party shall be
entitled to reasonable attorneys' fees, costs and necessary disbursements in
addition to any other relief to which such party may be entitled.

                2.7 Amendments and Waivers. Any term of this Agreement may be
amended and the observance of any term of this Agreement may be waived (either
generally or in a particular instance and either retroactively or
prospectively), only with the written consent of the Company and the holders of
a majority of the Registrable Securities then outstanding. Any amendment or
waiver effected in accordance with this paragraph shall be binding upon each
holder of any Registrable Securities then outstanding, each future holder of all
such Registrable Securities, and the Company.

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<PAGE>   9

                2.8 Severability. If one or more provisions of this Agreement
are held to be unenforceable under applicable law, the parties agree to
renegotiate such provision in good faith. In the event that the parties cannot
reach a mutually agreeable and enforceable replacement for such provision, then
(a) such provision shall be excluded from this Agreement, (b) the balance of the
Agreement shall be interpreted as if such provision were so excluded and (c) the
balance of the Agreement shall be enforceable in accordance with its terms.

                2.9 Entire Agreement. This Agreement, and the documents referred
to in this Agreement (with the exception of the registration statement)
constitute the entire agreement between the parties hereto pertaining to the
subject matter hereof, and any and all other written or oral agreements existing
between the parties hereto are expressly canceled.

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        IN WITNESS WHEREOF, the parties have executed this Registration Rights
Agreement as of the date first written above.

"COMPANY"

LANDACORP, INC.                        Address:  900 Fortress St., Suite 100
                                                --------------------------------
                                                 Chico, CA 95973
                                                --------------------------------
By: /s/ STEPHEN P. KAY
    ------------------------------

HOLDERS:

By: /s/ MICHAEL S. MIELE               Address:  51 Park St.
    ------------------------------              --------------------------------
      (Signature)                                Montclair, NJ 07042
                                                --------------------------------
    Michael S. Miele
    ------------------------------
      (Print Name)

By: /s/ JAMES TEIPEL                   Address:  118 Parkview Dr.
    ------------------------------              --------------------------------
      (Signature)                                Bloomfield, NJ 07003
                                                --------------------------------
    James Teipel
    ------------------------------
      (Print Name)

By: /s/ CHRISTOPHER SYNN               Address:  430 Valley Rd.
    ------------------------------              --------------------------------
      (Signature)                                Montclair, NJ 07043
                                                --------------------------------
    Christopher Synn
    ------------------------------
      (Print Name)

By: /s/ RICHARD R. SWEENEY, JR.        Address:  93 Beverly Road
    ------------------------------              --------------------------------
      (Signature)                                New Rochelle, NY 10804
                                                --------------------------------
    Richard R. Sweeney, Jr.
    ------------------------------
      (Print Name)

<PAGE>   11

                                    EXHIBIT A

                                 LANDACORP, INC.

                       SELLING STOCKHOLDER'S QUESTIONNAIRE

        In connection with the Landacorp, Inc. (the "Company") Registration
Statement (File No. _______________) registering certain shares of the Company's
common stock, the undersigned represents and warrants that the information set
forth below is true, accurate and complete:

        1. As of the date hereof, the undersigned beneficially owns ______
shares of the Company's common stock.

        2. Except as described below or as set forth in filings previously made
by the Company with the Securities and Exchange Commission ("SEC"), the
undersigned has not had a material relationship with the Company or any of its
predecessors or affiliates within the last three years.

        The term "material relationship" has not been defined by the SEC.
However, the SEC has indicated that it will probably construe as a "material
relationship" any relationship which tends to prevent arms length bargaining in
dealings with a company, whether arising from a close business connection or
family relationship, a relationship of control or otherwise. It seems prudent,
therefore, to consider that the undersigned would have such a relationship, for
example, with any organization of which the undersigned is an officer, director,
trustee or partner or in which the undersigned owns, directly or indirectly, ten
percent (10%) or more of the outstanding voting stock, or in which the
undersigned has some other substantial interest, and with any person or
organization with whom the undersigned has, or with whom any relative or spouse
(or any other person or organization as to which the undersigned has any of the
foregoing other relationships) has, a contractual relationship.

        If applicable, please describe the material relationship with the
Company:

Dated:                                 By:
      ----------------------------         -------------------------------------
                                                       (Signature)

                                       Name:
                                             -----------------------------------
                                                        (Print Name)
                                       Title:
                                              ----------------------------------
                                                       (if applicable)<PAGE>   1

                                                                     EXHIBIT 4.2

                                ESCROW AGREEMENT

        This ESCROW AGREEMENT (the "Escrow Agreement"), is dated as of
______________, 2000, among Landacorp, Inc., a Delaware corporation ("Parent"),
PatientCentrix, Inc., a Delaware corporation (the "Company"), Michael S. Miele
(the "Shareholder Representative"), Christopher C. Synn, James W. Tiepel and
Richard Sweeney, and Imperial Bank, a California banking corporation, as escrow
agent (in such capacity, the "Escrow Agent").

                              W I T N E S S E T H:

        WHEREAS, the Company, CDMS Acquisition Corp., a Delaware corporation
("Sub"), and Parent are parties to an Agreement and Plan of Merger, dated of
even date herewith (the "Merger Agreement"), pursuant to which Sub will be
merged with and into the Company (the "Merger"), with the Company surviving as a
wholly owned subsidiary of Parent (as such, the "Surviving Corporation"); and

        WHEREAS, under the Merger Agreement, the Parent Indemnified Parties (as
defined in the Merger Agreement) shall be indemnified, held harmless and
reimbursed as provided in Article 8 of the Merger Agreement; and

        WHEREAS, to ensure that funds will be available to indemnify, hold
harmless and reimburse the Parent Indemnified Parties as required by Article 8
of the Merger Agreement, Sections 2.4(a) and 8.1 of the Merger Agreement provide
that in connection with the Merger, Escrow Shares (as defined below) and Escrow
Cash (as defined below) shall be deposited with the Escrow Agent in an escrow
account established pursuant to this Escrow Agreement and held and subsequently
disbursed in accordance with the terms hereof; and

        WHEREAS, the Merger Agreement provides for the Shareholder
Representative to act in accordance herewith in connection with this Escrow
Agreement and the indemnification obligations contained in the Merger Agreement;
and

        WHEREAS, the Escrow Agent has agreed to hold the Escrow Fund pursuant to
the terms hereof.

        NOW, THEREFORE, in consideration of the mutual promises and covenants
herein contained, the parties hereto agree as follows:

                                    ARTICLE I
                                  DEFINED TERMS

        1.1) Defined Terms. Capitalized terms used and not otherwise defined in
this Agreement shall have the meanings assigned to them in the Merger Agreement.

        1.2) Additional Definitions. The following terms shall have the
following meanings:

        "Claim Amount" means as defined in Section 4.1.

<PAGE>   2

        "Claim Notice" means as defined in Section 4.1.

        "Company Shareholders" means the persons who, as of immediately prior to
the Effective Time, were shareholders of the Company and whose shares of Company
Common Stock were converted into Parent Common Stock pursuant to the Merger.

        "Current Market Value" with respect to shares of Parent Common Stock or
any other security, including any Permitted Investment, in the Escrow Fund means
the average of the closing prices of such security for each of the ten trading
days immediately preceding such date. The closing price of any such security on
any trading day shall be: (i) if such security is listed on a national market
securities exchange or quoted in the NASDAQ Stock Market, the last reported sale
price, or if no sale occurred on that day the mean between the closing bid and
asked prices, of such security on such exchange (or the principal exchange if
listed on more than one) or in the NASDAQ Stock Market, as the case may be, (ii)
if such security is not listed or quoted as described in clause (i), the mean
between the reported high bid and low asked prices of such security on such date
as reported in the financial press or by the National Quotation Bureau
Incorporated, or (ii) if neither clause (i) nor clause (ii) applies, the market
value of such security on such day as determined in good faith by the Board of
Directors of Parent. Upon request of the Escrow Agent, the Parent shall deliver
to it a notice setting forth its good faith calculation of the Current Market
Value of the Sold Shares or the Escrow Shares, which calculation shall be
binding on all parties absent manifest error.

        "Disputed Amount" means as defined in Section 4.2.

        "Distribution Amount" means as defined in Section 5.1.

        "Earnings" means as defined in Section 2.8.

        "Escrow Cash" means the Aggregate Cash Consideration and Additional Cash
Consideration (if any) to be distributed to the Escrow Agent in accordance with
Section 2.4(a) and Section 8.1 of the Merger Agreement, plus cash paid in lieu
of any fractional shares of Parent Common Stock pursuant to the Merger
Agreement.

        "Escrow Fund" means the Escrow Shares, together with the Escrow Cash and
any cash in lieu of fractional shares with respect to the Escrow Shares and any
interest thereon, any dividends or other distributions with respect to the
Escrow Shares that become payable to holders of record of record of Parent
Common Stock as of a date after the Effective Time, and any Sale Proceeds or
other cash generated pursuant to Section 3.2 or Section 3.3.

                                       2
<PAGE>   3

        "Escrow Shares" means the shares of Parent Common Stock to be
distributed to the Escrow Agent pursuant to Section 2.4(a) and Section 8.1 of
the Merger Agreement.

        "Permitted Investment" means as defined in Section 3.1.

        "Sale Notice" means as defined in Section 3.2.

        "Sale Proceeds" means as defined in Section 3.2.

        "Shareholder Representative's Expenses" means as defined in Section 7.2.

        "Subaccount" means as defined in Section 2.3.

        "Transfer Agent" shall mean Wells Fargo Shareowner Services (to the
attention of Jenny McElya, telephone number (651) 450-4093).

                                   ARTICLE II
                                     ESCROW

        2.1) The Escrow Account.

                (a) On the Closing Date, Parent shall issue and deliver to the
Escrow Agent (i) a certificate in the name of "Imperial Bank," as the Escrow
Agent, evidencing the Escrow Shares, and (ii) a bank check in an amount
representing the Escrow Cash. The Escrow Agent shall acknowledge receipt of such
certificate and bank check in writing to Parent and the Shareholder
Representative.

                (b) From time to time after the Closing, as if and when
Additional Cash Consideration (if any) is generated, Parent shall issue and
deliver to the Escrow Agent a bank check in an amount representing the
Additional Cash Consideration to be distributed to the Escrow Agent pursuant to
Section 2.4(a) of the Merger Agreement.

                (c) The Escrow Agent agrees to accept delivery of the Escrow
Fund to hold it in an escrow account (the "Escrow Account"), subject to the
terms and conditions of this Agreement and the Merger Agreement; however, except
for reference thereto for definitions of certain words or terms not defined
herein, the Escrow Agent is not charged with any duties or responsibilities with
respect to the Merger Agreement and shall not otherwise be concerned with the
terms thereof. The Escrow Account shall be a trust fund and shall not be subject
to any lien, attachment, trustee process or any other judicial process of any
creditor of any party to this Agreement. Concurrently with delivery of the
Escrow Shares to the Escrow Agent, Parent shall notify the Escrow Agent of the
Closing Date and the date of issuance of the first independent audit report
after the Effective Time covering the consolidated results of Parent and the
Surviving Corporation.

        2.2) Indemnification. Pursuant to the Merger Agreement, the Escrow Fund
shall be held in the Escrow Account for the duration of the Survival Period for
the sole purpose of satisfying claims brought pursuant to Article 9 of the
Merger Agreement. The Escrow Fund

                                       3
<PAGE>   4

shall be used to compensate and reimburse Parent Indemnified Parties for
indemnifiable claims as set forth in Article 9 of the Merger Agreement. The
Escrow Fund shall be security for the Company Shareholders' indemnity
obligations, subject to the limitations set forth in this Agreement and the
Merger Agreement.

        2.3) Subaccounts of Shareholders. On the Closing Date, Parent shall
deliver or cause to be delivered to the Escrow Agent a list of the name,
address, and tax identification number of each Company Shareholder, together
with the number of Escrow Shares (rounded to the nearest thousandth of a share)
and the amount of any Escrow Cash and any cash (representing dividends or other
distributions with respect to such Escrow Shares that have been become payable
to holders of record of record of Parent Common Stock as of a date after the
Effective Time with respect to such Escrow Shares) allocable to each Company
Shareholder. Unless Parent notifies the Escrow Agent otherwise, such cash shall
be allocated to the Company Shareholders in accordance with their pro rata share
of the Escrow Shares. The Escrow Agent shall establish a separate subaccount
("Subaccount") for each Company Shareholder and credit to such Subaccount such
number of Escrow Shares, Escrow Cash and other cash. From time to time after the
Closing, as if and when Additional Cash Consideration is generated, Parent shall
provide the Escrow Agent with instructions for allocating such Additional
Consideration among such subaccounts.

        2.4) Voting of Escrow Shares. Each Company Shareholder shall have the
right to vote all Escrow Shares (rounded down to the nearest whole share)
credited to such Company Shareholder's Subaccount. The Escrow Agent will forward
to each Company Shareholder to whose Subaccount any Escrow Shares are credited
all notices of Parent shareholders' meetings, proxy statements and reports to
shareholders received by the Escrow Agent in respect thereof. The Escrow Agent
will either (i) vote the Escrow Shares credited to such Company Shareholder's
Subaccount in accordance with written instructions received from such Company
Shareholder, or (ii) forward to such Company Shareholder a signed proxy enabling
the Company Shareholder to vote such Escrow Shares on a form provided by the
Company Shareholder or Parent. The Escrow Agent shall not vote the Escrow Shares
held on behalf of a Company Shareholder absent instructions from such Company
Shareholder. The Escrow Agent shall be reimbursed for the cost of such
forwarding in accordance with Section 6.4 hereof.

        2.5) Dividends, Interest Etc. All dividends and distributions in respect
of the Escrow Shares, whether in cash, additional Parent Common Stock or other
property received by the Escrow Agent, as well as any interest or gain on the
Escrow Cash shall be retained by the Escrow Agent as part of the Escrow Fund and
credited proportionately to the Subaccounts to which the Escrow Shares and
Escrow Cash are credited. If the Escrow Shares are reclassified or otherwise
changed into or exchanged for other securities, property or cash pursuant to any
merger, consolidation, sale of assets and liquidation or other transaction, the
securities, cash or other property received by the Escrow Agent in respect of
the Escrow Shares shall be retained by it as part of the Escrow Fund, credited
proportionately to the Subaccounts to which the Escrow Shares are credited and,
in the case of securities, registered in the name of the Escrow Agent.

        2.6) Transferability. The interests of the Company Shareholders in the
Escrow Fund are an integral part of the consideration in the Merger, and shall
not be assignable or transferable.

                                       4
<PAGE>   5

        2.7) Fractional Escrow Shares. Although each Company Shareholder's
Subaccount shall specify the number of Escrow Shares rounded to the nearest
thousandth of a share, no fractional shares of Parent Common Stock shall be
issued by Parent or released from the Escrow Account pursuant to this Agreement.
In connection with any release of Escrow Shares from the Escrow Account, the
Escrow Agent shall be permitted to "round down" or to follow such other rounding
procedures as the Escrow Agent reasonably determines to be appropriate in order
to avoid releasing any fractional shares from the Escrow Account.

        2.8) Taxes. All dividends, distributions, interest and gains earned or
realized on the Escrow Fund ("Earnings") and credited to a Subaccount shall be
accounted for by the Escrow Agent separately from the Escrow Fund and,
notwithstanding any provisions of this Agreement, shall be treated as having
been received by the Company Shareholders to whose Subaccount the Earnings are
credited for tax purposes. The Escrow Agent annually shall file information
returns with the United States Internal Revenue Service and payee statements
with the Company Shareholders, documenting such Earnings. The Company
Shareholders shall provide to the Escrow Agent all forms and information
necessary to complete such information returns and payee statements. In the
event the Escrow Agent becomes liable for the payment of taxes, including
withholding taxes, relating to Earnings or any payment made hereunder, the
Escrow Agent may deduct such taxes from the Escrow Fund.

                                   ARTICLE III
                    INVESTMENT OF FUND; SALE OF ESCROW SHARES

        3.1) Permitted Investments; Interest. From the date hereof until the
date of disbursement of the Escrow Fund pursuant to Section 5.1 hereof, the
Escrow Agent is authorized and directed to invest and reinvest the cash portion,
if any, of the Escrow Fund in an Imperial Bank money market account (a
"Permitted Investment"). Permitted Investments and interest accruing on, and any
profit resulting from, such investments shall be added to, and become a part of,
the Escrow Fund pursuant to this Escrow Agreement and shall be allocated among
the Subaccounts of the Company Shareholders based on the Permitted Investments
credited to the Subaccount of each. For purposes of this Escrow Agreement,
"interest" on the Escrow Fund shall include all proceeds thereof and investment
earnings with respect thereto. All Permitted Investments shall be registered in
the name of the Escrow Agent. The Escrow Agent shall have full power and
authority to sell any and all Permitted Investments held by it under this Escrow
Agreement as necessary to make disbursements under this Escrow Agreement. The
Escrow Agent, Parent, the Surviving Corporation and the Shareholder
Representative shall not be responsible for any unrealized profit or realized
loss realized on such investments.

        3.2) Release of Escrow Shares for Sale. If any Escrow Shares are
available for sale under Section 3.5 or are included in a Parent Registration
Statement on Form S-3 as provided in the Registration Rights Agreement, an
Indemnifying Shareholder may deliver to the Escrow Agent and to Parent a written
notice (a "Sale Notice") directing the Escrow Agent to deliver all (rounded down
to the nearest whole share) or a specified whole number of the Escrow Shares
(the "Sold Shares") credited to such Company Shareholder's Subaccount to a
broker or dealer for purposes of sale, against receipt by the Escrow Agent of
the proceeds of such sale, after deducting the commissions and other charges of
the broker or dealer effecting such sale (the "Sale Proceeds"). The Sale Notice
shall state: (i) that a specified number of Escrow Shares have

                                       5
<PAGE>   6

been sold to or through the broker-dealer named therein, (ii) the sale price per
share and the aggregate Sale Proceeds, and (iii) the date of payment for and
delivery of the Sold Shares, which shall not be less than five business days
after delivery of the Sale Notice. Escrow Agent shall have no obligation or
liability with regard to determining whether the Escrow Shares subject to a Sale
Notice are available for sale under Section 3.5 or are included in a Parent
Registration Statement on Form S-3.

        3.3) Shortage of Sale Proceeds. If the Sale Proceeds, after deducting
the commissions and other charges of the broker or dealer effecting such sale
("Net Sale Proceeds"), as set forth in the Sale Notice, are less than 100% of
the Current Market Value of the Sold Shares as of the date of sale, the Escrow
Agent shall not deliver the Sold Shares unless it receives for such selling
Common Shareholder's account, in addition to the Net Sale Proceeds, cash in an
amount equal to the excess of 100% of the Current Market Value of the Sold
Shares as of the date of sale over such Net Sale Proceeds.

        3.4) Retention of Sale Proceeds. The Sale Proceeds and additional cash,
if any, received by the Escrow Agent in respect of Sold Shares shall be retained
in the Escrow Fund and credited to the Subaccount of the selling Company
Shareholder.

        3.5) Restrictions on Sales. Escrow Shares shall be subject to the
transfer restrictions under Rule 144 and Rule 145 of the Securities Exchange Act
of 1934.

                                   ARTICLE IV
                          CLAIM PROCEDURES AND PAYMENTS

        4.1) Claim Notice. If Parent determines in good faith that a Parent
Indemnified Party is entitled to indemnification or reimbursement for Damages
under Article 8 of the Merger Agreement, then Parent may deliver to the
Shareholder Representative and the Escrow Agent a written notice of such claim
(a "Claim Notice") setting forth (i) a brief description in reasonable detail
(to the extent reasonably available to Parent) of the facts, circumstances or
events giving rise to the Damages based on Parent's good faith belief thereof,
including, without limitation, the identity and address of any third-party
claimant (to the extent reasonably available to Parent) and copies of any formal
demand or complaint, and (ii) Parent's non-binding, preliminary, good faith
estimate of the reasonably foreseeable maximum amount of the alleged Damages
(which amount may be the amount of damages claimed by a third party plaintiff in
an action brought against Parent or the Company based on alleged facts, which if
true, would constitute a breach of the Company's representations and warranties)
(such aggregate amount being referred to as the "Claim Amount"). Such Claim
Notice must be delivered on or before the termination of the relevant Survival
Period.

        4.2) Response Notice. Within fifteen (15) days after the delivery of a
Claim Notice to the Shareholder Representative, the Shareholder Representative
shall deliver to the Escrow Agent and Parent, a written notice (the "Response
Notice") containing: (i) instructions to the effect that entire Claim Amount set
forth in such Claim Notice is to be paid from the Escrow Fund to Parent; or (ii)
instructions to the effect that a specified portion (but not the entire amount)
of the Claim Amount set forth in such Claim Notice is to paid from the Escrow
Fund to Parent, together with a statement that the remaining portion of such
Claim Amount is being

                                       6
<PAGE>   7

disputed; or (iii) a statement that the entire Claim Amount set forth in such
Claim Notice is being disputed.

                (a) If no Response Notice is received by the Escrow Agent and
        Parent from the Shareholder Representative within fifteen (15) days
        after the delivery of a Claim Notice to the Company Shareholders, then
        the Company Shareholders shall be deemed to have given instructions that
        the entire Claim Amount set forth in such Claim Notice shall be paid to
        Parent.

                (b) If the Company Shareholders give (or are deemed to have
        given) instructions that the entire Claim Amount set forth in a Claim
        Notice may be paid from the Escrow Fund to Parent, then the Escrow Agent
        shall promptly, following the required delivery date for the Response
        Notice, pay to Parent the amount of such Claim from the Escrow Fund (or
        such lesser amount as is then held in the Escrow Fund) in the manner
        specified in Section 4.3 hereof.

                (c) If a Response Notice delivered by the Shareholder
        Representative in response to a Claim Notice contains instructions to
        the effect that a specified amount (but not the entire amount) of the
        Claim Amount set forth in such Claim Notice may be paid from the Escrow
        Fund to Parent, then (i) the Escrow Agent shall promptly, following the
        required delivery date for the Response Notice, pay to Parent such
        specified amount from the Escrow Fund, and (ii) the procedures set forth
        in Section 4.5 of this Agreement shall be followed with respect to the
        remaining portion of such Claim Amount.

                (d) If a Response Notice delivered by the Shareholder
        Representative in response to a Claim Notice contains a statement that
        all or a portion of the Claim Amount set forth in such Claim Notice is
        being disputed (such Claim Amount or the disputed portion thereof being
        referred to as the "Disputed Amount"), then such Disputed Amount shall
        not be paid until (i) delivery of a notice executed by Parent and the
        Shareholder Representative setting forth instructions to the Escrow
        Agent regarding the payment of such Disputed Amount, or (ii) delivery of
        a copy of a final and non-appealable judgment of a court or arbitrator
        setting forth instructions to the Escrow Agent as to the payment of such
        Disputed Amount. The Escrow Agent shall thereupon pay such Disputed
        Amount in accordance with the instructions set forth in such notice or
        arbitrator's award.

        4.3) Payment of Claims. Payments, deliveries or designations from the
Escrow Fund made pursuant to any Claim Notice shall be made, on a Subaccount by
Subaccount and pro rata basis as determined by the Shareholder Representative in
his sole discretion; provided, however, if the Shareholder Representative fails
to make such a determination within ten days after the Escrow Agent's request
therefor, then such payment shall be made, first, from cash, second from Escrow
Shares, third from Permitted Investments. For purposes of such payment, delivery
or designation, Escrow Shares and Permitted Investments shall be valued at their
Current Market Value. To the extent that any payment, delivery or designation is
made pursuant to this Escrow Agreement in the form of securities, such payment,
delivery or designation shall be rounded to the nearest whole number of such
securities, and no fractional securities shall be paid, delivered or designated.

                                       7
<PAGE>   8

        4.4) Allocation Among Subaccounts. Payments and deliveries pursuant to a
Claim Notice shall be charged to and withdrawn from each Subaccount in
proportion to the respective balances in each, unless the Escrow Agent is
restrained, enjoined or stayed by law or court order from withdrawing assets
from a Subaccount, in which case the amount which would have been drawn from
such Subaccount shall be allocated pro rata among and withdrawn from the
remaining Subaccounts as to which the Escrow Agent is not so restrained,
enjoined or stayed.

        4.5) Dispute Resolution. In the event that any Response Notice indicates
that there is a Disputed Amount, the Shareholder Representative and Parent
shall, for a period of sixty (60) days, attempt in good faith to resolve the
rights of the respective parties with respect to such Disputed Amount. If the
Shareholder Representative and Parent should so agree, a notice setting forth
such agreement shall be signed by the Shareholder Representative and by Parent
and sent to the Escrow Agent who shall thereupon pay to Parent from the Escrow
Fund such agreed upon amount (or such lesser amount as is then held in the
Escrow Fund).

                                    ARTICLE V
                          RELEASE OF ESCROW ACCOUNT TO
                              COMPANY SHAREHOLDERS

        5.1) Expiration of Survival Period. Promptly after the end of the
Survival Period, Escrow Agent shall disburse to the Company Shareholders an
aggregate amount (the "Distribution Amount") equal to (A) the amount remaining
in the Escrow Fund, less (B) any Disputed Amount, less (C) any Shareholder
Representative's Expenses (to the extent the Escrow Agent has received written
notice from the Shareholder Representative to such effect in accordance with
Section 7.2), and less (D) any expenses reimbursable to Parent pursuant to
Section 6.2 hereof. The Escrow Agent shall disburse the Distribution Amount to
the Company Shareholders based on each Company Shareholder's respective
Subaccount balance. No certificates or scrip representing fractional shares of
Parent Common Stock or any other security shall be issued upon the disbursement
of the Distribution Amount by the Transfer Agent. In lieu of any such fractional
share, each Company Shareholder who would otherwise have been entitled to a
fraction of a share of Parent Common Stock or other security upon disbursement
of the Distribution Amount will be paid an amount in cash (without interest),
rounded to the nearest cent, determined by multiplying (i) the Current Market
Value of such Parent Common Stock or such other securities (in the case of such
other securities, as of the Distribution Date) by (ii) the fractional interest
to which such holder would otherwise be entitled.

        5.2) Remaining Disbursements. Any amounts retained in the Escrow Fund
after the Distribution Date shall be held by the Escrow Agent first for the
payment of remaining Disputed Amounts, if any, and upon resolution of any
disputed claims and subject to the terms and conditions of this Escrow
Agreement, any remaining amounts in escrow shall be transferred to the
Shareholder Representative with respect to Shareholder Representative's Expenses
(to the extent the Escrow Agent has received written notice from the Shareholder
Representative to such effect in accordance with Section 7.2), and any remaining
amounts shall be disbursed in the manner set forth in Section 5.1.

                                   ARTICLE VI
                   LIABILITY AND COMPENSATION OF ESCROW AGENT

                                       8
<PAGE>   9

        6.1) No Implied Duties. The duties and obligations of the Escrow Agent
hereunder shall be determined solely by the express provisions of this Escrow
Agreement, and no implied duties or obligations shall be read into this Escrow
Agreement against the Escrow Agent. The Escrow Agent shall, in determining its
duties hereunder, be under no obligation to refer to any other documents between
or among the parties related in any way to this Escrow Agreement (except to the
extent that this Escrow Agreement specifically refers to or incorporates by
reference provisions of any other document).

        6.2) Indemnification of Escrow Agent. Parent shall indemnify and hold
the Escrow Agent harmless from and against any and all liability and expense
which may arise out of any action taken or omitted by the Escrow Agent in
accordance with this Escrow Agreement, except such liability and expense as may
result from the gross negligence or willful misconduct of the Escrow Agent. The
reasonable costs and expenses of the Escrow Agent to enforce its indemnification
rights under this Section 6.2 shall also be paid by Parent. Parent shall be
entitled to be reimbursed out of the Escrow Fund for fifty percent (50%) of any
amount that Parent is required to pay to the Escrow Agent pursuant to this
Section 6.2, payable following the expiration of the Survival Period in the
manner set forth in Section 5.1. This right to indemnification shall survive the
termination of this Escrow Agreement and removal or resignation of the Escrow
Agent. With respect to any claims or actions against the Escrow Agent which are
indemnified by Parent under this Section 6.2, Parent shall have the right to
retain sole control over the defense, settlement, investigation and preparation
related to such claims or actions; provided that (i) the Escrow Agent may employ
its own counsel to defend such a claim or action if it reasonably concludes,
based on the advice of counsel, that there are defenses available to it which
are different from or additional to those available to Parent and (ii) neither
Parent nor the Escrow Agent shall settle or compromise any such claim or action
without the consent of the other, which consent shall not be unreasonably
withheld or delayed.

        6.3) Standard of Care; Reliance. The Escrow Agent shall not be liable to
any person by reason of any error of judgment or for any act done or step taken
or omitted by it, or for any mistake of fact or law or anything which it may do
or refrain from doing in connection herewith unless caused by or arising out of
its own gross negligence or willful misconduct. The Escrow Agent shall be
entitled to rely on, and shall be protected in acting in reliance upon, any
instructions or directions furnished to it in writing signed by both Parent and
the Shareholder Representative pursuant to any provision of this Escrow
Agreement and shall be entitled to treat as genuine, and as the document it
purports to be, any letter, paper or other document furnished to it by any
Parent Indemnified Party or the Shareholder Representative, and believed by the
Escrow Agent to be genuine and to have been signed and presented by the proper
party or parties. In performing its obligations hereunder, the Escrow Agent may
consult with counsel to the Escrow Agent and shall be entitled to rely on, and
shall be protected in acting in reliance upon, the advice or opinion of such
counsel. Parent and the Shareholder Representative acknowledge that some or all
of the deliveries of Parent Common Stock may require the Escrow Agent to deliver
to the Transfer Agent the certificates representing the Parent Common Stock
included in the Escrow Fund. The Escrow Agent shall have discharged its
obligation to distribute Escrow Shares hereunder by delivering such shares to
the Transfer Agent with appropriate instructions. Escrow Agent shall have no
liability for any failure of the Transfer Agent to deliver to Escrow Agent or to
any Common Shareholder any Escrow Shares which the

                                       9
<PAGE>   10

Transfer Agent is required to redeliver to the Escrow Agent or any Common
Shareholder under the terms hereof.

        6.4) Compensation of Escrow Agent. The Escrow Agent shall be entitled to
its customary fee for the performance of services by the Escrow Agent hereunder
for each year or portion thereof that any portion of the Escrow Fund remains in
escrow and shall be reimbursed for reasonable costs and expenses incurred by it
in connection with the performance of such services (such fees, costs and
expenses are hereinafter referred to as the "Escrow Agent's Compensation"). A
schedule of the Escrow Agent's fees is attached hereto as EXHIBIT A. The Escrow
Agent shall render statements to Parent setting forth in detail the Escrow
Agent's Compensation and the basis upon which the Escrow Agent's Compensation
was computed. The Escrow Agent's Compensation shall be paid by Parent. To the
extent the Escrow Agent's Compensation is not paid by Parent, the foregoing
shall be paid from the Escrow Fund after written notice from the Escrow Agent to
Parent. Parent shall be entitled to be reimbursed out of the Escrow Fund for
fifty percent (50%) of any amount that Parent is required to pay to the Escrow
Agent pursuant to such reimbursement obligation, payable in the manner set forth
in Section 5.1 hereof.

        6.5) Resignation and Successor. The Escrow Agent may resign at any time
by giving sixty (60) days written notice to Parent and the Shareholder
Representative; provided that such resignation shall not be effective unless and
until a successor Escrow Agent has been appointed and accepts such position
pursuant to the terms of this Section 6.5. In such event, Parent and the
Shareholder Representative shall appoint a successor Escrow Agent or, if Parent
and the Shareholder Representative are unable to agree upon a successor Escrow
Agent within sixty (60) days after such notice, the Escrow Agent shall be
entitled to (i) appoint its own successor, provided that such successor is a
reputable national banking association or (ii) at the equal expense of Parent
and the Shareholder Representative, petition any court of competent jurisdiction
for the appointment of a successor Escrow Agent. Such appointment, whether by
Parent and the Shareholder Representative, on the one hand, or the Escrow Agent,
on the other hand, shall be effective on the effective date of the aforesaid
resignation (the "Escrow Transfer Date"). On the Escrow Transfer Date, all right
title and interest to the Escrow Fund, including interest thereon, shall be
transferred to the successor Escrow Agent and this Escrow Agreement shall be
assigned by the Escrow Agent to such successor Escrow Agent, and thereafter, the
resigning Escrow Agent shall be released from any further obligations hereunder.
The Escrow Agent shall continue to serve until its successor is appointed,
accepts the Escrow and receives the transferred Escrow Fund.

        6.6) Disputes. In the event any disagreement among Parent and the
Shareholder Representative results in adverse claims or demands being made in
connection with the Escrow Fund, or in the event the Escrow Agent in good faith
is in doubt as to what action it should take hereunder, the Escrow Agent shall
retain the Escrow Fund until the Escrow Agent shall have received (i) an
enforceable final order of a court of competent jurisdiction which is not
subject to further appeal directing delivery of the Escrow Fund or (ii) a
written agreement executed by Parent and the Shareholder Representative
directing delivery of the Escrow Fund, in which event Escrow Agent shall
disburse the Escrow Fund in accordance with such order or agreement. Any court
order referred to in clause (i) immediately above shall be accompanied by a
legal opinion of counsel for the presenting party satisfactory to the Escrow
Agent to the effect that said court

                                       10
<PAGE>   11

order or judgment is final and enforceable and is not subject to further appeal.
The Escrow Agent shall act on such court order and legal opinion without further
question.

        6.7) Limitation on Damages. In no event shall the Escrow Agent be liable
in connection with this Escrow Agreement for any special, indirect or
consequential loss or damage of any kind whatsoever, even if the Escrow Agent
has been previously advised of such loss or damage.

                                   ARTICLE VII
                           SHAREHOLDER REPRESENTATIVE

        7.1) Appointment. Pursuant to the Merger Agreement, the Shareholder
Representative shall act as agent and attorney-in-fact for the Company
Shareholders and is entitled to give and receive notices and communications, to
authorize delivery to the Parent Indemnified Parties of the Parent Common Stock
or other property from the Escrow Fund in satisfaction of claims by the Parent
Indemnified Parties, to object to such deliveries in accordance with the terms
of this Escrow Agreement, to agree to, negotiate, enter into settlements and
compromises of, and demand arbitration and comply with orders of courts and
awards of arbitrators with respect to such claims, and to take all actions
necessary or appropriate in the judgment of the Shareholder Representative for
the accomplishment of the foregoing. All actions of the Shareholder
Representative shall be in writing signed by both of the above-named individual,
or his successors, acting in their capacity as Shareholder Representative. The
person designated to be the Shareholder Representative may be changed in
accordance with the provisions set forth in Section 10.12 of the Merger
Agreement.

        7.2) Expenses. At least five (5) days prior to the first anniversary of
the Distribution Date, the Shareholder Representative shall deliver notice to
the Escrow Agent and Parent setting forth the amount of the reasonable
out-of-pocket expenses incurred by the Shareholder Representative in connection
with its duties under the Merger Agreement and hereunder (the "Shareholder
Representative's Expenses"), which expenses shall be reimbursed from the Escrow
Fund in accordance with the provision of Section 5.2 hereof.

        7.3) Authority and Reliance. Neither Parent, any Parent Indemnified
Party, the Company, nor the Escrow Agent shall be responsible or liable for any
acts or omissions of the Shareholder Representative in his capacity as such. A
decision, act, consent or instruction of the Shareholder Representative shall
constitute a decision of all Company Shareholders for whom shares of Parent
Common Stock otherwise issuable to them are deposited in the Escrow Fund and
shall be final, binding and conclusive upon each such Company Shareholder, and
the Escrow Agent and Parent may rely upon any decision, act, consent or
instruction of the Shareholder Representative as being the decision, act,
consent or instruction of each and every such Company Shareholder. The Escrow
Agent and each Parent Indemnified Party are hereby relieved from any liability
to any person for any acts done by them in accordance with such decision, act,
consent or instruction of the Shareholder Representative.

                                  ARTICLE VIII
                         REPRESENTATIONS AND WARRANTIES

                                       11
<PAGE>   12

        8.1) Representations by Parent, the Company and Escrow Agent. Each of
Parent, the Company and the Escrow Agent represents and warrants to each of the
other parties hereto that it is duly organized, validly existing and in good
standing under the laws of its jurisdiction of formation; that it has the power
and authority to execute and deliver this Escrow Agreement and to perform its
obligations hereunder; that the execution, delivery and performance of this
Escrow Agreement by it has been duly authorized and approved by all necessary
action; that this Escrow Agreement constitutes its legal, valid and binding
obligation, enforceable against it in accordance with its terms; and that the
execution, delivery and performance of this Escrow Agreement by it will not
result in a breach of or loss of rights under or constitute a default under or a
violation of any trust (constructive or other), agreement, judgment, decree,
order or other instrument to which it is a party or it or its properties or
assets may be bound.

        8.2) Representations by Shareholder Representative. The Shareholder
Representative represents to each of the other parties hereto that such
Shareholder Representative has the power and authority to execute and deliver
this Escrow Agreement and to perform his obligations hereunder; that this Escrow
Agreement constitutes his legal, valid and binding obligation, enforceable
against him in accordance with its terms; and that the execution, delivery and
performance of this Escrow Agreement by him will not result in a breach of or
loss of rights under or constitute a default under or a violation of any trust
(constructive or other), agreement, judgment, decree, order or other instrument
to which he is a party or by which his properties or assets may be bound.

                                   ARTICLE IX
                                   TERMINATION

        9.1) This Escrow Agreement may be terminated following the delivery of
all amounts held in the Escrow Fund and the delivery of a notice by the Escrow
Agent as contemplated by Article V hereof or upon the mutual written agreement
of each of the parties hereto.

                                    ARTICLE X
                                     GENERAL

        10.1) Other Agreements. Nothing in this Agreement is intended to limit
any of the Company's, Parent's or the Company Shareholders' rights, or any
obligation of the Company Shareholders, or of Parent under the Merger Agreement
(or any agreement entered into in connection with the transactions contemplated
by the Merger Agreement).

        10.2) Governing Law. This Agreement shall be governed by and construed
in accordance with the laws of the state of California, without giving effect to
the conflict of laws provisions thereunder.

        10.3) Benefit; Successor and Assigns. This Escrow Agreement shall be
binding upon and inure to the benefit of the parties hereto and their respective
successors and permitted assigns but shall not be assignable by any party hereto
without the written consent of all of the other parties hereto; provided,
however, that Parent may assign its rights and delegate its obligations
hereunder to any successor corporation in the event of a merger, consolidation
or transfer or sale of all or substantially all of Parent's stock or assets and
that the Escrow Agent may assign its

                                       12
<PAGE>   13

rights hereunder to a successor Escrow Agent appointed hereunder. Except for the
persons specified in the preceding sentence, this Escrow Agreement is not
intended to confer on any person not a party hereto any rights or remedies
hereunder.

        10.4) Severability. If any provision of this Agreement, or the
application of such a provision, is for any reason and to any extent invalid or
unenforceable, the remainder of this Agreement and application of such provision
to other circumstances shall be interpreted so as reasonably to effect the
intent of the parties to this Agreement. The parties shall replace such void or
unenforceable provision of this Agreement with a valid and enforceable provision
that shall achieve, to the greatest extent possible, the economic, business and
other purposes of the void or unenforceable provision.

        10.5) Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
shall constitute one and the same instrument. This Agreement shall become
binding when one or more counterparts of it, individually or taken together,
whether delivered via facsimile or otherwise, bear the signatures of all the
parties reflected hereon as signatories.

        10.6) Amendment and Waivers. Any term or provision of this Agreement may
be amended, and the observance of any term of this Agreement may be waived
(either generally or in a particular instance and either retroactively or
prospectively) only by a writing signed by the party to be bound thereby.
Notwithstanding any rights that may be created in any third party under the
terms of this Agreement, no such amendment or waiver shall require the consent
of such third party to be effective. The waiver by a party of any breach of this
Agreement or default in the performance of any obligations under this Agreement
shall not be deemed to constitute a waiver of any other default or any
succeeding breach or default.

        10.7) Attorneys' Fees. Should suit be brought to enforce or interpret
any part of this Agreement, the prevailing party shall be entitled to recover,
as an element of the costs of suit and not as damages, reasonable attorneys'
fees to be fixed by the court (including, without limitation, costs, expenses
and fees on any appeal). The prevailing party shall be entitled to recover such
party's costs of suit, regardless of whether such suit proceeds to final
judgment.

        10.8) Notices. All notices and other communications hereunder shall be
in writing and shall be deemed given when delivered personally by commercial
courier service or otherwise, or by telecopier, or three days after such notice
is mailed by registered or certified mail (return receipt requested) to the
parties at the following addresses (or at such other address for a party as
shall be specified by like notice):

                (a)     if to Parent or the Company, to it at:

                        Landacorp, Inc.
                        900 Fortress Street, Suite 100
                        Chico, California  95973
                        Attention:  Stephen P. Kay
                        FAX:  (530) 899-7430

                                       13
<PAGE>   14

                        With a copy to:

                        Wilson Sonsini Goodrich & Rosati
                        650 Page Mill Road
                        Palo Alto, California 94304-1050
                        FAX:  (650) 493-6811

        With separate copies thereof addressed to:

                (b)     If to the Shareholder Representative, to him at:

                        Michael S. Miele
                        51 Park Street
                        Montclair, New Jersey  07042
                        FAX:  (973) 783-7597

                        with a copy to:

                        Lowenstein Sandler PC
                        65 Livingston Avenue
                        Roseland, New Jersey 07068-1791
                        FAX:  (973) 597-2400

                (c)     If to the Escrow Agent:

                        Imperial Bank
                        275 Battery Street, Suite 1100
                        San Francisco, CA 94111-3305
                        FAX:  (415) 954-5066
                        Attention: Lawrence T. Nelson

        All such notices and other communications shall be deemed to have been
received (a) in the case of personal delivery, on the date of such delivery, (b)
in the case of a telecopy, when the party receiving such copy shall have
confirmed receipt of the communication, and (c) in the case of delivery by
nationally recognized overnight courier, on the business day following dispatch.

        10.9) Construction of Agreement. This Agreement has been negotiated by
the respective parties hereto and their attorneys and the language of this
Agreement shall not be construed for or against any party. A reference to a
Section shall mean a Section in this Agreement unless otherwise explicitly set
forth. The titles and headings in this Agreement are for reference purposes only
and shall not in any manner limit the construction of this Agreement, which
shall be considered as a whole.

        10.10) Further Assurances. Each party agrees to cooperate fully with the
other parties and to execute such further instruments, documents and agreements
and to give such further written assurances as may be reasonably requested by
any other party to evidence and reflect the

                                       14
<PAGE>   15

transactions described in this Agreement and contemplated by it and to carry
into effect the intents and purposes of this Agreement.

        10.11) Entire Agreement. This Agreement and the Merger Agreement and the
exhibits and schedules to this Agreement and to the Merger Agreement constitute
the entire understanding and agreement of the parties to this Agreement with
respect to the subject matter of this Agreement and supersede all prior and
contemporaneous agreements or understandings, inducements or conditions, express
or implied, written or oral, between the parties with respect hereto. The
express terms of this Agreement control and supersede any course of performance
or usage of trade inconsistent with any of the terms of this Agreement.

        10.12) Arbitration. All disputes and claims made by Parent, Company, or
the Shareholder Representative against Escrow Agent arising from or relating in
any way to this Escrow Agreement shall be resolved by mandatory binding
expedited arbitration under the Commercial Arbitration Rules of the American
Arbitration Association ("AAA") in effect as of the date the request for
arbitration is filed (the "Rules") before a single, neutral arbitrator, selected
in accordance with the Rules. Each of the parties may initiate such an
arbitration pursuant to the Rules. The arbitration shall be held in San
Francisco, California (such site being herein referred to as the "Forum").
Parent, Company, the Shareholder Representative, and Escrow Agent each agree
that it will abide by any decision rendered in such arbitration, and that any
court having jurisdiction may enforce such a decision. Each of the parties
hereto submits to the non-exclusive personal jurisdiction of the courts of the
Forum as an appropriate place for compelling arbitration or giving legal
confirmation of any arbitration award, and irrevocably waives any objection
which it may now or hereafter have to the venue of any such enforcement
proceeding brought in any of said courts and any claim of inconvenient forum.
Each of the parties agrees that service of process for all arbitration
proceedings may be made in accordance with the Rules and shall be deemed
effective as provided therein.

                           [SIGNATURE PAGE TO FOLLOW]

                                       15
<PAGE>   16

        IN WITNESS WHEREOF, the parties have executed this Escrow Agreement as
of the date first above written.

                                       LANDACORP, INC.

                                       By: /s/ STEPHEN P. KAY
                                           -------------------------------------
                                          Its: COO / CFO
                                               ---------------------------------

                                       PATIENTCENTRIX, INC.

                                       By: /s/ RICHARD R. SWEENEY, JR.
                                           -------------------------------------
                                          Its: Vice President
                                               ---------------------------------

                                       IMPERIAL BANK

                                       By: /s/ LAWRENCE NELSON
                                           -------------------------------------
                                           Lawrence Nelson, Vice President

                                               /s/ MICHAEL S. MIELE
                                       -----------------------------------------
                                                   Michael S. Miele

                                               /s/ CHRISTOPHER C. SYNN
                                       -----------------------------------------
                                                   Christopher C. Synn

                                                 /s/ JAMES W. TEIPEL
                                       -----------------------------------------
                                                     James W. Teipel

                                                  /s/ RICHARD SWEENEY
                                       -----------------------------------------
                                                      Richard Sweeney

                      [SIGNATURE PAGE TO ESCROW AGREEMENT]

<PAGE>   17

                                   EXHIBIT "A"
                                       TO
                                ESCROW AGREEMENT

                         ESCROW AGENT'S SCHEDULE OF FEES

Parent agrees to pay the Escrow Agent, as compensation for its services
hereunder: (a) a $4,000 non-refundable start-up fee, payable upon the Escrow
Agent's execution of this Agreement and, thereafter, a fee of $4,000 on each
anniversary date of the Escrow Agreement; and (b) a $50 fee (both in and out)
for each disbursement or transmittal of Escrow Shares, together with any fees or
charges of Imperial Bank, all of which shall be payable upon Escrow Agent's
demand. For example, if the Escrow Agent were to receive a certificate
representing Escrow Shares to hold as the Escrow Agent, then a $50 fee would be
payable. If the Escrow Agent was required to disburse Escrow Shares and other
Escrow Fund property to three Common Shareholders, then a $150 fee would be due
to the Escrow Agent.

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