Document:

<PAGE>
                                                                   EXHIBIT 10.17

                     SETTLEMENT AGREEMENT AND MUTUAL RELEASE

         This Settlement Agreement and Mutual Release ("Agreement") is made by
and among Landacorp, Inc. (the "Company"), Eugene Santa Cattarina ("Cattarina")
and Michael S. Miele ("Miele"), Christopher C. Synn ("Synn"), James W. Tiepel
("Tiepel"), Richard Sweeney ("R. Sweeney"), Stephen Brooks ("Brooks"), Mary Dean
("Dean"), Ian Duncan ("Duncan"), Percival Herrero ("Herrero"), John Burke
("Burke"), Arthur Robb ("Robb"), Anne Forbes ("Forbes"), Virginia O'Shea
("O'Shea"), Lucia Egoavil ("Egoavil"), Thomas Sweeney ("T. Sweeney"), and
Bradley Green ("Green") (collectively referred to hereinafter as the
"PatientCentrix Parties").

         WHEREAS, certain of the PatientCentrix Parties entered into an
Agreement and Plan of Merger By and Among the Company, CDMS Acquisition Corp.,
PatientCentrix, Inc. ("PatientCentrix"), Miele, Synn, and Tiepel, dated October
31, 2000 ("Merger Agreement");

         WHEREAS the Merger Agreement provided for certain contingent payments
to be made to certain of the PatientCentrix Parties (the "Earn Out");

         WHEREAS, a Merger of the Company and PatientCentrix (the "Merger")
resulted from the aforementioned Agreement and Plan of Merger;

         WHEREAS, certain disputes have arisen relating to the Merger Agreement
and the calculation and payment of the Earn Out, in the course of which the
Company has asserted, inter alia, that the Earn Out is properly calculated at
$77,096.00, while Miele has asserted that the Earn Out should be calculated at a
greater amount, and has also asserted other claims related to the Merger
Agreement and the Earn Out; and

         WHEREAS, the parties hereto, for themselves and their respective heirs,
successors, assigns, agents, representatives, affiliates, subsidiaries,
officers, directors, divisions, predecessor and successor corporations, and any
person or entity claiming by or through any of them have mutually agreed to
settle such disputes as provided herein;

         NOW THEREFORE, in consideration of the mutual promises made herein, the
parties hereto hereby agree as follows:

         1.       Consideration.

                  (a)      Settlement of Earn Out Claims. The parties hereto
acknowledge that there is a bona fide dispute among them as to the amount of the
Earn Out and the performance by the Company of its obligations under the Merger
Agreement in connection therewith. In full settlement of such disputes and in
full payment of the Earn Out, the Company has agreed to pay to the
PatientCentrix Parties a sum of up to $400,000 as provided herein. In accordance
with the Allocation Schedule set forth in the Merger Agreement and attached
hereto as Exhibit A, all PatientCentrix Parties who have executed this Agreement
as of the Effective Date shall be paid their allocated percentage of the Earn
Out from a sum of $375,000.00. Any PatientCentrix Parties who have not executed
this Agreement as of the Effective Date shall be paid their allocated percentage
of the Earn Out from a sum of $77,096.00. On the Effective Date, the sum of
$25,000.00 shall also be paid to Miele in reimbursement of legal fees incurred
by him in connection with the matters which are the subject of this Agreement.
Payment pursuant to this
<PAGE>

paragraph shall be made by the Company by wire transfer of immediately available
funds to an account previously specified by such PatientCentrix Party on April
1, 2002. Interest on each payment shall accrue from the Effective Date until
April 1, 2002 at a variable rate per annum equal to the "Prime Rate" as
published in the Wall Street Journal on the first business day of each month. No
interest shall accrue after April 1, 2002, unless the Company fails to pay the
amounts owed when due.

                  (b)      Miele Options. In further consideration for Miele's
release of all of his claims related to the Merger and the Merger Agreement, as
of the Effective Date the exercise price of all options to purchase shares of
the Company's Common Stock held by Miele shall be reduced to $0.39 per share.
All of such options shall be immediately exercisable for a period of one year
from the Effective Date and shall expire, if not exercised on or prior thereto,
on the first anniversary of the Effective Date. In furtherance of the foregoing,
Miele and the Company are hereby simultaneously entering into amendments to the
existing options agreements, which amendments are attached hereto as Exhibit B.

                  (c)      Board Seat. In further consideration for Miele's
release of all of his claims related to the Merger and the Merger Agreement, no
later than the Effective Date, the Company shall and shall cause its Board of
Directors to take all action necessary to elect Miele as a director of the
Company, effective on the date hereof. Miele's term as a director shall expire
on the first anniversary of the Effective Date, subject to his earlier death,
resignation or removal for cause (as determined in accordance with the Delaware
General Corporation Law).

         2.       Location of Parties. Miele shall use commercially reasonable
efforts to cooperate with the Company in its effort to cause each PatientCentrix
Party to become a party to this Agreement; provided, however, that Miele shall
not be obligated to incur any expense, make any payment or provide any
consideration in connection therewith, other than reasonable expenses in
locating and contacting PatientCentrix Parties for which he will be reimbursed
by the Company upon demand.

         3.       Effective Date. This Agreement shall become effective on the
date (the "Effective Date") this Agreement has been executed by the Company and
each PatientCentrix Party; provided, however, that if fewer than all of the
PatientCentrix Parties have executed this Agreement on or before 5:00 p.m., New
York time, on February 28, 2002, the Company shall have the sole and exclusive
right, exercisable as described below, to determine whether or not the Agreement
becomes effective among the parties who have executed and delivered this
Agreement. In the event that the Company wishes to exercise its right to declare
the Agreement effective, the Company shall give written notice thereof (by
facsimile or overnight courier to the recipient's address as specified in the
Company's records or as otherwise noticed to the Company by the recipient) to
all PatientCentrix Parties (whether or not they are parties to this Agreement at
such time) which notice shall specify a date (which shall be no earlier than two
(2) business days after the date the notice is given) on which the Effective
Date is to occur. Any PatientCentrix Party that has not executed the Agreement
shall have the right to become a party to this Agreement by executing and
delivering to the Company (which delivery may be by facsimile) a counterpart of
this Agreement not later than 5:00 p.m., New York time, on the Effective Date
established by the Company. If the Effective Date does not occur on or before
5:00 p.m., New York time, on March 13, 2002, this Agreement shall be of no
further force

                                     - 2 -
<PAGE>

and effect. The PatientCentrix Parties becoming parties to this Agreement on or
before the Effective Date are hereinafter referred to as the "Settling Parties".

         4.       Confidential Information.

                  (a)      The confidentiality and non-competition provisions of
the Employment Agreement dated October 31, 2000, between Miele and the Company
and that certain Settlement Agreement and Mutual Release dated May 7, 2001,
between Miele and the Company and the provisions of the Nondisclosure Inventions
Agreement, dated December 18, 1998, by and between Miele and PatientCentrix
shall continue to be in full force and effect.

                  (b)      The provisions of any employment agreement,
confidentiality agreement, invention disclosure agreement, non-competition
agreement or other similar agreement entered into by any Settling Party with
either the Company or PatientCentrix shall continue to be in full force and
effect.

         5.       Mutual Releases; Consents.

                  (a)      Each of the Settling Parties agrees that the
consideration set forth herein represents settlement in full of all outstanding
obligations owed to any of them by Cattarina, the Company, and/or its officers
and directors (excluding employment-related obligations owed by the Company to
any Settling Party that is currently an employee of or consultant to the
Company). Each Settling Party, on behalf of himself or herself and his or her
respective heirs, family members, executors, officers, directors, employees,
investors, shareholders, administrators, affiliates, divisions, subsidiaries,
predecessor and successor corporations, and assigns and any person or entity
claiming by or through any of the foregoing, hereby fully and forever releases
Cattarina, the Company, and or/its officers and directors, their respective
heirs, family members, executors, officers, directors, employees, investors,
shareholders, administrators, affiliates, divisions, subsidiaries, predecessor
and successor corporations, and assigns and any person or entity claiming by or
through any of the foregoing.

                  (b)      Each of Cattarina and the Company agrees that the
consideration set forth herein represents settlement in full of all outstanding
obligations owed to any of them by each of the Settling Parties (excluding
employment-related obligations owed to the Company by any Settling Party that is
currently an employee of or consultant to the Company). Each of Cattarina and
the Company, on behalf of themselves and their respective heirs, family members,
executors, officers, directors, employees, investors, shareholders,
administrators, affiliates, divisions, subsidiaries, predecessor and successor
corporations, and assigns and any person or entity claiming by or through any of
the foregoing, hereby fully and forever releases the Settling Parties, their
respective heirs, family members, executors, officers, directors, employees,
investors, shareholders, administrators, affiliates, divisions, subsidiaries,
predecessor and successor corporations, and assigns and any person or entity
claiming by or through any of the foregoing.

                  (c)      Each Settling Party (other than Miele) acknowledges
that Miele has claims against Cattarina, the Company, and/or its officers and
directors that are unique to Miele and that the additional consideration to be
received by Miele hereunder in settlement of those claims is

                                     - 3 -
<PAGE>

fair and appropriate. Accordingly, each Settling Party (other than Miele) hereby
irrevocably consents to the consideration to be received by Miele hereunder.
Further, each Settling Party (other than Miele), on behalf of himself or herself
and his or her respective heirs, family members, executors, officers, directors,
employees, investors, shareholders, administrators, affiliates, divisions,
subsidiaries, predecessor and successor corporations, and assigns and any person
or entity claiming by or through any of the foregoing, hereby fully and forever
releases Miele, his heirs, family members, executors, officers, directors,
employees, investors, shareholders, administrators, affiliates, divisions,
subsidiaries, predecessor and successor corporations, and assigns and any person
or entity claiming by or through any of the foregoing.

                  (d)      No party hereto shall sue or assert any claims
against any other party hereto concerning any claim, duty, obligation or cause
of action relating to any matters of any kind, existing now or arising in the
future, including without limitation, those claims sounding in breach of
contract, tort or fraud, whether presently known or unknown, knowable or
unknowable, suspected or unsuspected, that any of them may possess arising from
any omissions, acts or facts that have occurred until and including the date of
this Agreement, including but not limited to:

                           (i)      any and all claims arising from or related
to the Merger Agreement;

                           (ii)     any and all claims arising from or related
to the Merger of the Company with PatientCentrix;

                           (iii)    any and all claims arising from or related
to the conduct, action or inaction of Eugene Santa Cattarina, individually
and/or as an officer and director of the Company;

                           (iv)     any and all claims arising from or related
to the conduct, action or inaction of the Company, its officers or directors or
PatientCentrix, its officers, directors and shareholders;

                           (v)      any and all claims arising from or related
to the operation or management of PatientCentrix;

                           (vi)     any and all claims arising from or related
to Miele's consulting relationship with the Company, its officers and directors;

                           (vii)    any and all claims arising from or related
to Miele's service as Shareholders' Representative pursuant to the Merger
Agreement;

                           (viii)   any and all claims arising from or related
to the relationship between Miele and any other Settling Party.

                  (e)      This release does not extend to any Settling Party's
rights to indemnification and exculpation under the Company's Certificate of
Incorporation and Bylaws and pursuant to Delaware law or under any applicable
director and officer liability insurance policy of the Company or
PatientCentrix.

                                     - 4 -
<PAGE>

                  (f)      This release shall not be construed to absolve or
relieve any of the Settling Parties (other than Miele) from performing their
respective duties and obligations that arise pursuant to or in connection with
such person's current employment, if any, with the Company.

                  (g)      The parties agree that, except as set forth in
clauses (e) and (f), the release set forth in this section shall be and remain
in effect in all respects as a complete general release as to the matters
released. Moreover, this Agreement and release is a supplement to, and does not
supercede, the Settlement Agreement and Mutual Release dated May 7, 2001, and
the releases set forth therein.

         6.       No Pending or Future Lawsuits. The parties represent that no
lawsuits, claims, or actions are pending in their respective names, or on behalf
of any other person or entity, against any other party or any other person or
entity referred to herein. Each party hereto also represents that it does not
intend to bring any claims on its own behalf or on behalf of any other person or
entity against any other party or any other person or entity referred to herein
relating to the matters released hereby.

         7.       Confidentiality. The parties hereto each agree to use their
reasonable best efforts to maintain in confidence the existence of this
Agreement, the contents and terms of this Agreement, and the consideration for
this Agreement (hereinafter collectively referred to as "Settlement
Information"). Each party hereto agrees to take commercially reasonable
precautions to prevent disclosure of any Settlement Information to third
parties. The parties hereto agree to take commercially reasonable precautions to
disclose Settlement Information only to those employees, officers, directors,
attorneys, accountants, governmental entities, and family members who have a
reasonable need to know of such Settlement Information. Notwithstanding the
foregoing, the Company shall be permitted to disclose Settlement Information
publicly if, and to the extent, in the reasonable opinion of counsel to the
Company, such disclosure is required in accordance with applicable state or
federal securities laws, including, without limitation, Regulation FD
promulgated by the Securities Exchange Commission.

         8.       Non-Disparagement. Each party agrees to refrain from any
defamation, libel or slander of the other, or tortious interference with the
contracts and relationships of the other parties hereto.

         9.       No Admission of Liability. The parties understand and
acknowledge that this Agreement constitutes a compromise and settlement of
disputed claims. No action taken by the parties hereto, or any of them, either
previously or in connection with this Agreement shall be deemed or construed to
be (a) an admission of the truth or falsity of any claims heretofore made or (b)
an acknowledgment or admission by either party of any fault or liability
whatsoever to the other party or to any third party.

         10.      Arbitration. The parties agree that any and all disputes
arising out of the terms of this Agreement, their interpretation, and any of the
matters herein released, shall be subject to binding arbitration in Newark, New
Jersey before the American Arbitration Association and its dispute resolution
rules, or by a judge to be mutually agreed upon. The parties agree that the
prevailing party in any arbitration shall be entitled to injunctive relief in
any court of competent

                                     - 5 -
<PAGE>

jurisdiction to enforce the arbitration award. The parties agree that the
prevailing party in any arbitration shall be awarded its reasonable attorney's
fees and costs.

         11.      Authority. The Company represents and warrants that the
undersigned has the authority to act on behalf of the Company and to bind the
Company and all who may claim through it to the terms and conditions of this
Agreement. Each Settling Party warrants and represents that there are no liens
or claims of lien or assignments in law or equity or otherwise of or against any
of the claims or causes of action released herein.

         12.      Legal Counsel; No Representations. Each party represents that
it has had the opportunity to consult with an attorney, and has carefully read
and understands the scope and effect of the provisions of this Agreement. Each
party acknowledges that Lowenstein Sandler PC has acted as counsel only to Miele
with respect to this Agreement and the matters which are the subject hereof.
Each Settling Party has been advised of his or her right to retain separate
counsel with respect hereto and has had the opportunity to discuss this
Agreement and the matters which are the subject hereof with counsel of his or
her own choosing to the extent he or she desired to do so. No party has relied
upon any representations or statements made by any other party hereto which are
not specifically set forth in this Agreement.

         13.      Severability. In the event that any provision hereof becomes
or is declared by a court of competent jurisdiction to be illegal, unenforceable
or void, this Agreement shall continue in full force and effect without said
provision. Further, in the event any sub-part of any provision hereof, including
but not limited to any portion of the Releases, becomes or is declared by a
court of competent jurisdiction to be illegal, unenforceable or void, the
remaining sub-parts of that same provision shall continue in full force and
effect without said sub-part.

         14.      Entire Agreement. This Agreement represents the entire
agreement and understanding between the parties with respect to the subject
matter hereof.

         15.      No Oral Modification. This Agreement may only be amended or
modified in a writing signed by the party or parties intended to be bound
thereby.

         16.      Governing Law. This Agreement shall be governed by the laws of
the State of New Jersey.

         17.      Counterparts. This Agreement may be executed in counter-parts,
and each counterpart shall have the same force and effect as an original and,
only if the Effective Date shall occur as provided herein, shall constitute an
effective, binding agreement on the part of each of the undersigned.

         18.      Voluntary Execution of Agreement. This Agreement is executed
voluntarily and without any duress or undue influence on the part or behalf of
the parties hereto, with the full intent of releasing all claims. The parties
acknowledge that:

                  (a)      They have read this Agreement;

                                     - 6 -
<PAGE>

                  (b)      They have been represented in the preparation,
negotiation, and execution of this Agreement by legal counsel of their own
choice or that they have voluntarily declined to seek such counsel;

                  (c)      They understand the terms and consequences of this
Agreement and of the releases it contains;

                  (d)      They are fully aware of the legal and binding effect
of this Agreement.

                                     - 7 -
<PAGE>

                  IN WITNESS WHEREOF, the parties have executed this Agreement
on the respective dates set forth below.

                                     LANDACORP, INC.

Dated:   February ___, 2002          By:
                                        ---------------------------------------

                                     EUGENE SANTA CATTARINA,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                Eugene Santa Cattarina,

                                     MICHAEL S. MIELE,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                   Michael S. Miele,

                                     CHRISTOPHER C. SYNN,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                 Christopher C. Synn,

                                     JAMES TEIPEL,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                    James Teipel,

                                     - 8 -
<PAGE>

                                     RICHARD SWEENEY,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                  Richard Sweeney,

                                     STEPHEN BROOKS,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                    Stephen Brooks,

                                     MARY DEAN,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                       Mary Dean,

                                     IAN DUNCAN,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                      Ian Duncan,

                                     PERCIVAL HERRERO,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                    Percival Herrero

                                     - 9 -
<PAGE>

                                     JOHN BURKE,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                     John Burke,

                                     ARTHUR ROBB,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                     Arthur Robb,

                                     ANNE FORBES,

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                     Anne Forbes,

                                     VIRGINIA O'SHEA

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                 Virginia O'Shea

                                     LUCIA EGOAVIL

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                  Lucia Egoavil

                                     - 10 -
<PAGE>

                                     THOMAS SWEENEY

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                      Thomas Sweeney

                                     BRADLEY GREEN

Dated:   February ___, 2002          By:
                                        ---------------------------------------
                                                      Bradley Green

                                     - 11 -
<PAGE>

EXHIBIT A

                               Allocation Schedule

<TABLE>
<CAPTION>
                                       EXISTING OPTIONS                   COMMON
                         1998 GRANT       1999 GRANT      2000 GRANT       STOCK           TOTAL       % ALLOCATION
<S>                      <C>           <C>                <C>             <C>            <C>           <C>
Richard Sweeney            125,000        125,000                                          250,000         12.69%
Stephen Brooks                            125,000                                          125,000          6.35%
Michael S. Miele                           40,000           80,000         950,000       1,070,000         54.31%
Mary Dean                                  15,000                                           15,000          0.76%
James W. Tiepel                                            125,000          40,000         165,000          8.38%
Ian Duncan                                                 150,000                         150,000          7.61%
Percival Herrero                                            10,000                          10,000          0.51%
John Burke                                                  60,000                          60,000          3.05%
Arthur Robb                                                 20,000                          20,000          1.02%
Anne Forbes                                                 20,000                          20,000          1.02%
Virginia O'Shea                                              5,000                           5,000          0.25%
Lucia Egoavil                                                5,000                           5,000          0.25%
Thomas Sweeney                                              15,000                          15,000          0.76%
Bradley Green                                               10,000                          10,000          0.51%
Christopher C. Synn                                                         50,000          50,000          2.54%

----------------------------------------------------------------------------------------------------------------------
Totals                     125,000        305,000          500,000         1,040,000     1,970,000           100%
======================================================================================================================
</TABLE>

                                     - 12 -
<PAGE>

EXHIBIT B

                             [LANDACORP LETTERHEAD]
                                 FEBRUARY, 2002

MICHAEL MIELE
[ADDRESS]

                              RE: OPTION REPRICING
Dear Mr. Miele:

         Reference is made to that certain Settlement Agreement and Mutual
Release (the "Settlement Agreement"), dated the date hereof, by and among
Landacorp, Inc. ("Landacorp"), you and certain other former shareholders and
optionholders of PatientCentrix, Inc., formerly Capitated Disease Management
Services, Inc. ("PatientCentrix"). Pursuant to Section 1(b) of the Settlement
Agreement, Landacorp has agreed to reduce, to $0.39 per share, the exercise
price applicable to all of your options to purchase shares of Landacorp Common
Stock (including your PatientCentrix options which were assumed by Landacorp).

         This letter will confirm that the Board of Directors of Landacorp has
determined that the new exercise price applicable to all of your existing
options to purchase Landacorp Common Stock shall be $0.39 per share. In
addition, all such options shall be immediately exercisable for a period of one
year from the Effective Date of the Settlement Agreement and shall expire, if
not exercised on or prior thereto, one year after the Effective Date of the
Settlement Agreement. Such anniversary is hereinafter referred to as the
`Expiration Date.' The options shall be exercisable at any time or from time to
time on or prior to the Expiration Date notwithstanding any provision of any
applicable option plan or option agreement to the contrary. To the extent that
any such option plan or option agreement contains any provision which conflicts
with the provisions of this letter (including, without limitation, as to the
exercisability or expiration of the options), the provisions of this letter
shall control.

         Attached hereto as Exhibit 1 is a schedule of your existing options to
purchase shares of Landacorp Common Stock, showing the applicable option plan
pursuant to which the options were issued, the original grant date, the original
exercise price, the new exercise price and the new expiration date. Attached as
Exhibit 2 are the documents that you will need to sign and return to my
attention in order to effect the repricing and other changes to the terms of
your options.

                                       Sincerely,

                                       Eugene Miller

                                     - 13 -
<PAGE>

                                                                       EXHIBIT 1

                   Outstanding Options as of February __, 2002

<TABLE>
<CAPTION>
                                                                                                       New
                                                                                  Original           Exercise
                                           Number of Shares                     Exercise Price       Price Per      Expiration
             Option Plan                  Subject to Option     Grant Date         Per Share           Share           Date
---------------------------------------   ------------------    ----------      ---------------      ----------     -----------
<S>                                       <C>                   <C>             <C>                  <C>            <C>
Capitated Disease                        44,500                                 $  1.28              $  0.39         ____/03
Management Services, Inc.
Stock Compensation Program
Capitated Disease                        89,000                                 $  3.19              $  0.39          ____/03
Management Services, Inc.
Stock Compensation Program
Landacorp  Equity Incentive Plan        197,790                                 $  1.50              $  0.39           ____/03
</TABLE>

                                     - 14 -
<PAGE>

                                                                       EXHIBIT 2

                           AMENDMENT OF STOCK OPTIONS

The undersigned optionee hereby elects to amend each of the following stock
options pursuant to the terms set forth in the foregoing letter dated February
__, 2002 from Landacorp:

<TABLE>
<CAPTION>
                                          Option #1             Option #2            Option #3
                                          ---------             ---------            ---------
<S>                                       <C>                   <C>                  <C>
Option Grant Date:                          ______                ______              _______
Number of Shares
 Remaining Unexercised:                     44,500                89,000              197,790
Exercise Price:                            $  0.39               $  0.39             $   0.39
</TABLE>

                                  Instructions

         Please set forth above the information required with respect to each
outstanding stock option that you wish to amend.

         The undersigned acknowledges receipt of the Company's letter dated
February ___, 2002 and the enclosures referenced therein and contained
therewith. The undersigned hereby agrees to be bound by all of the terms and
conditions of the repricing program as described in said letter, and understands
that stock options shall be immediately exercisable for a period of one year
from the Effective Date of the Settlement Agreement and shall expire, if not
exercised on or prior thereto, one year from the Effective Date of the
Settlement Agreement.

                                     -------------------------------------------
                                     Michael Miele

                                     Date:
                                          --------------------------------------

                                     - 15 -<PAGE>

                                                                   EXHIBIT 10.18

                            STOCK PURCHASE AGREEMENT

     THIS STOCK PURCHASE AGREEMENT (the "Agreement") is made this day 17" March
1999 by and between LANDA MANAGEMENT SYSTEMS CORPORATION, a California
corporation (the "Company"), and Eugene Santa Cattarina, ("Purchaser").

                                  WITNESSETH:

     WHEREAS, Purchaser holds a stock option dated October 20th , 1998 to
purchase shares of common stock of the Company (the "Option") pursuant to the
Company's 1998 Equity Incentive Plan (the "Plan") which Purchaser desires to
exercise; and

     WHEREAS, Purchaser wishes to take advantage of the early exercise provision
of the Option, and therefore to enter into this Agreement.

     NOW, THEREFORE, IT Is AGREED between the parties as follows:

     1. Purchaser hereby agrees to purchase from the Company, and the Company
hereby agrees to sell to Purchaser, an aggregate of eight hundred and five
thousand, five hundred and fifty shares (805,550) of common stock (the "Stock")
of the Company, for a purchase price of 12/100 US dollars ($0.12) per share
(total purchase price: Ninety six thousand, six hundred and sixty six 00/100 US
dollars ($96,666.00)), payable as follows:

                Cash at Closing                         $     0.00

                Promissory Note in the form
                of Exhibit D (the "Note")               $96,666.00
                                                        ----------

                Total Purchase Price                    $96,666.00
                                                        ==========

     The closing hereunder shall occur at the offices of the Company on the date
of this Agreement or at such other time and place as the parties may mutually
agree upon in writing.

     At the closing, Purchaser shall deliver two (2) stock assignments in the
form of Exhibit B, duly endorsed (with date and number of shares left blank),
joint escrow instructions (the "Joint Escrow Instructions") in the form of
Exhibit C, duly executed by Purchaser, and the total purchase price (including
an executed Note in the form of Exhibit D if a portion of the total purchase
price is to be paid by promissory note and an executed pledge agreement in the
form of Exhibit E (the "Pledge Agreement") under which all shares of the Stock
acquired by Note shall be pledged as collateral security for the payment of the
indebtedness represented by the Note.

     At the closing or as soon thereafter as practicable, the Company shall
deliver to the Escrow Agent (as defined in paragraph 8 below) share certificates
for all of the Stock that is- to be subject to the Purchase Option (as defined
in paragraph 2 below), and shall deliver share certificates to Purchaser for all
of the Stock, if any, that is not to be subject to the Purchase Option or the
Pledge

                                       1

<PAGE>

Agreement. The certificates for all of the Stock that is subject to the Pledge
Agreement but not the Purchase Option shall be retained by the Company as
security pursuant to the Pledge Agreement.

     2. The Stock to be purchased by Purchaser pursuant to this Agreement shall
be subject to the following option ("Purchase Option"):

        (A) In the event that Purchaser's Continuous Service (as that term is
defined in the Plan) shall terminate for any reason (including Purchaser's
death), or no reason, with or without cause, the Purchase Option may- be
exercised. The Company shall have the right at any time within ninety (90) days
after such termination of Continuous Service, or such longer period as may
determined by the Company if such later repurchase is deemed necessary by the
Company for treatment of its stock as Qualified Small Business Stock under
Section 1202 of the Internal Revenue Code of 1986, as amended, and regulations
promulgated thereunder, to exercise its option to repurchase from Purchaser or
his personal representative, as the case may be, at the price per share paid by
Purchaser pursuant to this Agreement ("Option Price"), up to but not exceeding
the number of unvested shares of the Stock set forth on Exhibit A hereto, which
is incorporated herein by this reference.

        (B) In addition, and without limiting the foregoing Purchase Option, if
at any time during the term of the Purchase Option there occurs a transaction
described in Section 11(b) or 11(c) of the Plan (e.g., a dissolution,
liquidation, asset sale, merger, consolidation or reverse merger of the
Company), then: (i) the Company shall exercise the Purchase Option to the same
extent that the unvested portion of the Option would have terminated pursuant to
Section 11(b) or 11(c) of the Plan if the Option had not been exercised pursuant
to this Agreement, (ii) the Purchase Option shall lapse to the same extent that
the unvested portion of the Option would have automatically accelerated pursuant
to Section 11(c) of the Plan if the Option had not been exercised pursuant to
this Agreement or (iii) the Purchase Option may be assigned to any successor to
the Company to the same extent that the unvested portion of the Option would
have been assumed or substituted by such successor if the Option had not been
exercised pursuant to this Agreement, in which case the Purchase Option shall
apply on the same basis as set forth above to the Stock or to the consideration
received for the Stock by the Purchaser in the transaction (as the case may be)
if Purchaser's Continuous Service with such successor terminates for any reason.
The continuing or surviving entity shall be deemed to be the successor to the
Company for purposes of this Agreement, and references herein to the "Company"
shall be deemed to refer to such successor.

        (C) The Company shall be entitled to pay for any of the Stock purchased
pursuant to its Purchase Option at the Company's option in cash, by offset
against any indebtedness owing to the Company by Purchaser including without
limitation any note given in payment for the Stock, or a combination of both.

        (D) This Agreement is not an employment contract and nothing in this
Agreement shall be deemed to create in any way whatsoever any obligation on the
part of Purchaser to continue in the employ of the Company or any Affiliate (as
defined in the Plan) thereof, or of the Company or any Affiliate thereof to
continue Purchaser in its employ. In addition, nothing in this Agreement shall
obligate the Company or any Affiliate thereof, their

                                       2
<PAGE>

respective stockholders, boards of directors, officers or employees to continue
any relationship that you might have as a director or consultant for the Company
or any Affiliate thereof.

     3. The Purchase Option may be exercised by giving written notice of
exercise delivered or mailed as provided in paragraph 14. Upon providing of such
notice and payment or tender of the purchase price, the Company shall become the
legal and beneficial owner of the Stock being purchased and all rights and
interests therein or related thereto.

     4. If from time to time during the term of the Purchase Option there is any
stock dividend or liquidating dividend or distribution of cash and/or property,
stock split or other change in the character or amount of any of the outstanding
securities. of the Company, then, in such event, any and all new, substituted or
additional securities or other property to which Purchaser is entitled by reason
of his ownership of Stock will be immediately subject to the Purchase Option and
be included in the word "Stock" for all purposes of the Purchase Option with the
same force and effect as the shares of Stock then subject to the Purchase
Option. While the total Option Price shall remain the same after each such
event, the Option Price per share of Stock upon exercise of the Purchase Option
shall be appropriately adjusted.

     5. All certificates representing any shares of Stock of the Company subject
to the provisions of this Agreement shall have endorsed thereon legends in
substantially the following form:

        (A) "The shares represented by this certificate are subject to an option
set forth in an agreement between the Company and the registered holder, or
registered holder's predecessor in interest, a copy of which is on file at the
principal office of this Company. Any transfer or attempted transfer of any
shares subject to such option is void without the prior express written consent
of the issuer of these shares."

        (B) "These securities have not been registered under the Securities Act
of 1933. They may not be sold, offered for sale, pledged or hypothecated in the
absence of an effective registration statement as to the securities under said
Act or an opinion of counsel satisfactory to the Company that such registration
is not required."

        (C) "The shares represented by this certificate are subject to a right
of first refusal option in favor of the Company and/or its assignees) as
provided in the Bylaws of the Company."

        (D) Any legend required to be placed thereon by the California
Commissioner of Corporations.

     6. Purchaser acknowledges that he or she is aware that the Stock to be
issued to him or her by the Company pursuant to this Agreement has not been
registered under the Securities Act of 1933, as amended (the "Act"), on the
basis that no distribution or public offering of the Stock is to be effected,
and in this connection acknowledges that the Company is relying on the following
representations. In this connection, Purchaser warrants and represents to the
Company that he or she is acquiring the Stock for investment and not with a view
to or for sale in

                                       3
<PAGE>

connection with any distribution of the Stock or with any present intention of
distributing or selling the Stock and he or she does not presently have reason
to anticipate any change in circumstances or any particular occasion or event
which would cause him or her to sell the Stock. Purchaser recognizes that the
Stock must be held indefinitely unless it is subsequently registered under the
Act or an exemption from such registration is available and, further, recognizes
that the Company is under no obligation to register the Stock or to comply with
any exemption from such registration.

     7. Purchaser is aware that the Stock may not be sold pursuant to Rule 144
adopted under the Act unless certain conditions are met and until Purchaser. has
held the Stock for the applicable holding period set forth in Rule 144. Among
the conditions for use of Rule 144 is the availability of specified current
public information about the Company. Purchaser recognizes that the Company
presently has no plans to make such information available to the public.

     Whether or not the Purchase Option is exercised or has lapsed, Purchaser
further agrees not to make any disposition of any of the Stock in any event
unless and until:

        (A) There is then in effect a registration statement under the Act
covering such proposed disposition and such disposition is made in accordance
with such registration statement; or

        (B) (i) Purchaser shall have notified the Company of the proposed
disposition and shall have furnished the Company with a detailed statement of
the circumstances surrounding the proposed disposition, and (ii) Purchaser shall
have given the Company an opinion of counsel, which opinion and counsel shall be
satisfactory to the Company, to the effect that such disposition will not
require registration of the Stock under the Act.

     8. As security for his faithful performance of the terms of this Agreement
and to insure the availability for delivery of Purchaser's Stock upon exercise
of the Purchase Option herein provided for, Purchaser agrees, at the closing
hereunder (or as soon thereafter as practicable), to deliver (or have the
Company deliver on the Purchaser's behalf) to and deposit with the Secretary of
the Company ("Escrow Agent"), as Escrow Agent in this transaction, two (2) stock
assignments duly endorsed (with date and number of shares left blank) in the
form attached hereto as Exhibit B, together with a certificate or certificates
evidencing all of the Stock subject to the Purchase Option; said documents are
to be held by the Escrow Agent and delivered by said Escrow Agent pursuant to
the Joint Escrow Instructions of the Company and Purchaser set forth in Exhibit
C attached hereto and incorporated herein by this reference, which instructions
shall also be delivered to the Escrow Agent at the closing hereunder (or as soon
thereafter as practicable).

     9. Purchaser shall not sell or transfer any of the Stock subject to the
Purchase Option or any interest therein so long as such Stock is subject to the
Purchase Option. In addition, the Purchaser agrees that the Company (or a
representative of the underwriters) may, in connection with the first
underwritten registration of the offering of any securities of the Company under
the Act, require that Purchaser not sell, dispose of, transfer, make any short
sale of, grant any option for the purchase of, or enter into any hedging or
similar transaction with the same economic

                                       4
<PAGE>

effect as a sale, any of the Stock or other securities of the Company held by
you, for a period of time specified by the underwriters) (not to exceed one
hundred eighty (180) days) following the effective date of the registration
statement of the Company filed under the Act.

     10. The Company shall not be required (a) to transfer on its books any
shares of Stock of the Company which shall have been sold or transferred in
violation of any of the provisions set forth in this Agreement or (b) to treat
as owner of such shares or to accord the right to vote as such owner or to pay
dividends to any transferee to whom such shares shall have been so transferred.

     11. Subject to the provisions of paragraphs 9 and 10 above, Purchaser (but
not any unapproved transferee) shall, during the term of this Agreement,
exercise all rights and privileges of a stockholder of the Company with respect
to the Stock.

     12. The shares of Stock purchased under the terms of this Agreement are
subject to the right of first refusal provided for in the Bylaws of the Company.

     13. The parties agree to execute such further instruments and to take such
further action as reasonably may be necessary to carry out the intent of this
Agreement.

     14. Any notice required or permitted hereunder shall be given in writing
and shall be deemed effectively given upon personal delivery or upon deposit in
any United States Post Office Box, by registered or certified mail with postage
and fees prepaid, addressed to the other party hereto at his address hereinafter
shown below his signature or at such other address as such party may designate
by ten (10) days' advance written notice to the other party hereto.

     15. This Agreement shall bind and inure to the benefit of the successors
and assigns of the Company and, subject to the restrictions on transfer herein
set forth, inure to the benefit of and be binding upon Purchaser, his heirs,
executors, administrators, successors, and assigns. Without limiting the
generality of the foregoing, the Purchase Option of the Company hereunder shall
be assignable by the Company at any time or from time to time, in whole or in
part.

                                       5
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed this Stock Purchase
Agreement as of the day and year first set forth above.

                                   LANDA MANAGEMENT SYSTEMS CORPORATION

                                   By: Stephen P. Kay
                                       -----------------------------------

                                   Its: COO/CFO
                                       -----------------------------------

                        Address:   1072 Marauder Street, Suite A
                                   Chico, CA 95973

                                   /S/ Eugene Santa Cattarina
                                   ---------------------------------------
                                   EUGENE SANTA CATTARINA
                        Address:   1072 Marauder Street, Suite A

                        Address:   540 Chestnut Rose Lane
                                   Atlanta, GA 30327

ATTACHMENTS:

Exhibit A     Vesting Schedule
Exhibit B     Assignment Separate from Certificate
Exhibit C     Joint Escrow Instructions
Exhibit D     Promissory Note
Exhibit E     Pledge Agreement

                                       6

<PAGE>

                                   EXHIBIT A

                                VESTING SCHEDULE

IF CONTINUOUS SERVICE                                NUMBER OF UNVESTED SHARES
TERMINATES:                                          SUBJECT TO PURCHASE OPTION:

        Before 19th July 1999                        805,550.0       shares
                                                     ----------------
        After 19th July 1999
          but before 19th August 1999                604,162.5       shares
                                                     ----------------
        After 19th August 1999
          but before 19th September 1999             587,380.2       shares
                                                     ----------------
        After 19th September 1999
          but before 19th October 1999               570,597.9       shares
                                                     ----------------
        After 19th October 1999
          but before 19th November 1999              553,815.6       shares
                                                     ----------------
        After 19th November 1999
          but before 19th December 1999              537,033.3       shares
                                                     ----------------
        After 19th December 1999
          but before 19th January 2000               520,251.0       shares
                                                     ----------------
        After 19th January 2000
          but before 19th February 2000              503,468.7       shares
                                                     ----------------
        After 19th February 2000
          but before 19th March 2000                 486,686.4       shares
                                                     ----------------
        After 19th March 2000
          but before 19th April 2000                 469,904.1       shares
                                                     ----------------
        After 19th Aril 2000
          but before 19th May 2000                   453,121.8       shares
                                                     ----------------

                                       1
<PAGE>

                            EXHIBIT A (CONTINUED)

                               VESTING SCHEDULE

IF CONTINUOUS SERVICE                                NUMBER OF UNVESTED SHARES
TERMINATES:                                          SUBJECT TO PURCHASE OPTION:

        After 19th May 2000
          but before 19th June 2000                  436,339.5       shares
                                                     ----------------

        After 19th June 2000
          but before 19th July                       419,557.2       shares
                                                     ----------------

        After 19th July 2000
          but before 19th August 2000                402,774.9        shares
                                                     ----------------

        After 19th August 2000
          but before 19th September 2000             385,992.6        shares
                                                     ----------------

        After 19th September 2000
          but before 19th October 2000               369,210.3        shares
                                                     ----------------

        After 19th October 2000
          but before 19th November 2000              352,428.0        shares
                                                     ----------------

        After 19th November 2000
          but before 19th December 2000              335,645.7        shares
                                                     ----------------

        After 19th December 2000
          but before 19th January 2001               318,863.4        shares
                                                     ----------------

        After 19th January 2001
          but before 19th February 2001              302,081.1        shares
                                                     ----------------

        After 19th February 2001
          but before 19th March 2001                 285,298.8        shares
                                                     ----------------

                                        2

<PAGE>

                              EXHIBIT A (CONTINUED)

                                VESTING SCHEDULE

IF CONTINUOUS SERVICE                                NUMBER OF UNVESTED SHARES
TERMINATES:                                          SUBJECT TO PURCHASE OPTION:

        After 19th March 2001
          but before 19th April 2001                 268,516.5       shares
                                                     ----------------
        After 19th April 2001
          but before 19th May 2001                   251,734.2       shares
                                                     ----------------
        After 19th May 2001
          but before 19th June 2001                  234,951.9       shares
                                                     ----------------
        After 19th June 2001
          but before 19th July 2001                  218,169.6       shares
                                                     ----------------
        After 19th July 2001
          but before 19th August 2001                201,387.3       shares
                                                     ----------------
        After 19th August 2001
          but before 19th September 2001             184,605.0       shares
                                                     ----------------
        After 19th September 2001
          but before 19th October 2001               167,822.7       shares
                                                     ----------------
        After 19th October 2001
          but before 19th November 2001              151,040.4       shares
                                                     ----------------
        After 19th November 2001
          but before 19th December 2001              134,258.1       shares
                                                     ----------------

        After 19th December 2001
          but before 19th January 2002               117,475.8       shares
                                                     ----------------

                                       3
<PAGE>

                              EXHIBIT A (CONTINUED)

                                VESTING SCHEDULE

IF CONTINUOUS SERVICE                                NUMBER OF UNVESTED SHARES
TERMINATES:                                          SUBJECT TO PURCHASE OPTION:

        After 19th January 2002
          but before 19th February 2002              100,693.5       shares
                                                     ----------------
After 19th February 2002
  but before 19th March 2002                          83,911.2       shares
                                                     ----------------

After 19th March 2002
  but before 19th April 2002                          67,128.9       shares
                                                     ----------------

After 19th April 2002
  but before 19th Magi                                50,346.6       shares
                                                     ----------------

After 19th May 2002
  but before 19th June 2002                           33,564.3       shares
                                                     ----------------

After 19th June 2002
  but before 19th July 2002                           16,782.0       shares
                                                     ----------------

After 19th July 2002                                       0.0       shares
                                                     ----------------

                                       4
<PAGE>

                                   EXHIBIT B

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

     FOR VALUE RECEIVED and pursuant to that certain Stock Purchase Agreement
dated as of .17th March 1999, (the "Agreement") Eugene Santa Cattarina hereby
sells, assigns and transfers unto Landa Management Systems Corporation () shares
of common stock of Landa Management Systems Corporation, _____________ (_______)
a California corporation, standing in the undersigned's name on the books of
said corporation represented by Certificate No._____ herewith, and does hereby
irrevocably constitute and appoint ____________ attorney to transfer the said
stock on the books of the said corporation with full power of substitution in
the premises. This Assignment may be used only in accordance with and subject to
the terms and conditions of the Agreement, in connection with the repurchase of
shares of Common Stock issued to the undersigned pursuant to the Agreement, and
only to the extent that such shares remain subject to the Company's Purchase
Option under the Agreement.

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

                                        /s/ Eugene Santa Cattarina
                                        -----------------------------------
                                        [Signature]

                                        Eugene Santa Cattarina
                                        -----------------------------------

[INSTRUCTION: Please do not fill in any blanks other than the signature line.
The purpose of this Assignment is to enable the Company to exercise its
repurchase option set forth in the Agreement without requiring additional
signatures on the part of Purchaser.]

<PAGE>

                                   EXHIBIT B

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

     FOR VALUE RECEIVED and pursuant to that certain Stock Purchase Agreement
dated as of 17th March 1999, (the "Agreement") Eugene Santa Cattarina hereby
sells, assigns and transfers unto Landa Management Systems Corporation shares of
common stock of Landa Management Systems Corporation, _____________ (_______) a
California corporation, standing in the undersigned's name on the books of said
corporation represented by Certificate No.____ herewith, and does hereby
irrevocably constitute and appoint ____________ attorney to transfer the said
stock on the books of the said corporation with full power of substitution in
the premises. This Assignment may be used only in accordance with and subject to
the terms and conditions of the Agreement, in connection with the repurchase of
shares of Common Stock issued to the undersigned pursuant to the Agreement, and
only to the extent that such shares remain subject to the Company's Purchase
Option under the Agreement.

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

                                        /s/ Eugene Santa Cattarina
                                        -----------------------------------
                                        [Signature]

                                        Eugene Santa Cattarina
                                        -----------------------------------

[INSTRUCTION: Please do not fill in any blanks other than the signature line.
The purpose of this Assignment is to enable the Company to exercise its
repurchase option set forth in the Agreement without requiring additional
signatures on the part of Purchaser.]

<PAGE>

                                   EXHIBIT C

                           JOINT ESCROW INSTRUCTIONS

Stephen P. Kay, Company Secretary
Landa Management Systems Corporation
1072 Marauder, Suite A
Chico, CA 95973

Dear Sir:

     As Escrow Agent for both Landa Management Systems Corporation, a California
corporation ("Company"), and the undersigned purchaser of stock of the Company
("Purchaser"), you are hereby authorized and directed to hold the documents
delivered to you pursuant to the terms of that certain Stock Purchase Agreement
("Agreement"), dated 17TH MARCH 1999, to which a copy of these Joint Escrow
Instructions is attached as Exhibit C in accordance with the following
instructions:

     1. In the event the Company or an assignee shall elect to exercise: the
Purchase Option set forth in the Agreement, the Company or its assignee will
give to Purchaser and you a written notice specifying the number of shares of
stock to be purchased, the purchase price, and the time for a closing hereunder
at the principal office of the Company. Purchaser and the Company hereby
irrevocably authorize and direct you to close the transaction contemplated by
such notice in accordance with the terms of said notice.

     2. At the closing you are directed (a) to date any stock assignments
necessary for the transfer in question, (b) to fill in the number of shares
being transferred, and (c) to deliver same, together with the certificate
evidencing the shares of stock to be transferred, to the Company against the
simultaneous delivery to you of the purchase price (which may include suitable
acknowledgment of cancellation of indebtedness) of the number of shares of stock
being purchased pursuant to the exercise of the Purchase Option.

     3. Purchaser irrevocably authorizes the Company to deposit with you any
certificates evidencing shares of stock to be held by you hereunder and any
additions and substitutions to said shares as specified in the Agreement.
Purchaser does hereby irrevocably constitute and appoint you as his
attorney-in-fact and agent for the term of this escrow to execute with respect
to such securities and other property all documents of assignment and/or
transfer and all stock certificates necessary or appropriate to make all
securities negotiable and complete any transaction herein contemplated.

     4. This escrow shall terminate upon expiration or exercise in full of the
Purchase Option, whichever occurs first.

                                       1.
<PAGE>

     5. If at the time of termination of this escrow you should have in your
possession any documents, securities, or other property belonging to Purchaser,
you shall deliver all of same to Purchaser and shall be discharged of all
further obligations hereunder; provided, however, that if at the time of
termination of this escrow you are advised by the Company that the property
subject to this escrow is the subject of a pledge or other security agreement,
you shall deliver all such property to the pledgeholder or other person
designated by the Company.

     6. Except as otherwise provided in these Joint Escrow Instructions, your
duties hereunder may be altered, amended, modified or revoked only by a writing
signed by all of the parties hereto.

     7. You shall be obligated only for the performance of such duties as are
specifically set forth herein and may rely and shall be protected in relying or
refraining from acting on any instrument reasonably believed by you to be
genuine and to have been signed or presented by the proper party or parties or
their assignees. You shall not be personally liable for any act you may do or
omit to do hereunder as Escrow Agent or as attorney-in-fact for Purchaser while
acting in good faith and any act done or omitted by you pursuant to the advice
of your own attorneys shall be conclusive evidence of such good faith.

     8. You are hereby expressly authorized to disregard any and all warnings
given by any of the parties hereto or by any other person or corporation,
excepting only orders or process of courts of law, and are hereby expressly
authorized to comply with and obey orders, judgments or decrees of any court. In
case you obey or comply with any such order, judgment or decree of any court,
you shall not be liable to any of the parties hereto or to any other person,
firm or corporation by reason of such compliance, notwithstanding any such
order, judgment or decree being subsequently reversed, modified, annulled, set
aside, vacated or found to have been entered without jurisdiction.

     9. You shall not be liable in any respect on account of the identity,
authority or rights of the parties executing or delivering or purporting to
execute or deliver the Agreement or any documents or papers deposited or called
for hereunder.

     10. You shall not be liable for the outlawing of any rights under any
statute of limitations with respect to these Joint Escrow Instructions or any
documents deposited with you.

     11. Your responsibilities as Escrow Agent hereunder shall terminate if you
shall cease to be Secretary of the Company or if you shall resign by written
notice to each party. In the event of any such termination, the Company may
appoint any officer or assistant officer of the Company as successor Escrow
Agent and Purchaser hereby confirms the appointment of such successor or
successors as his attorney-in-fact and agent to the full extent of your
appointment.

     12. If you reasonably require other or further instruments in connection
with these Joint Escrow Instructions or obligations in respect hereto; the
necessary parties hereto shall join in furnishing such instruments.

     13. It is understood and agreed that should any dispute arise with respect
to the delivery and/or ownership or right of possession of the securities, you
are authorized and

                                       2.
<PAGE>

directed to retain in your possession without liability to anyone all or any
part of said securities until such dispute shall have been settled either by
mutual written agreement of the parties concerned or by a final order, decree or
judgment of a court of competent jurisdiction after the time for appeal has
expired and no appeal has been perfected, but you shall be under no duty
whatsoever to institute or defend any such proceedings.

     14. Any notice required or permitted hereunder shall be given in writing
and shall be deemed effectively given upon personal delivery, including delivery
by express courier or five days after deposit in the United States Post Office,
by registered or certified mail with postage and fees prepaid, addressed to each
of the other parties hereunto entitled at the following addresses, or at such
other addresses as a party may designate by ten days' advance written notice to
each of the other parties hereto:

                Company:        Stephen P. Kay, Company Secretary
                                Landa Management Systems Corporation
                                1072 Marauder, Suite A
                                Chico, CA 95973

                Purchaser:      Eugene Santa Cattarina
                                540 Chestnut Rose Lane
                                Atlanta, GA 30327

                Escrow Agent:   Stephen P. Kay, Company Secretary
                                Landa Management Systems Corporation
                                1072 Marauder, Suite A
                                Chico, CA 95973

     15. By signing these Joint Escrow Instructions you become a party hereto
only for the purpose of said Joint Escrow Instructions; you do not become a
party to the Agreement.

     16. You shall be entitled to employ such legal counsel and other experts
(including without limitation the firm of Cooley Godward LLP) as you may deem
necessary properly to advise you in connection with your obligations hereunder.
You may rely upon the advice of such counsel, and may pay such counsel
reasonable compensation therefor. The Corporation shall be responsible for all
fees generated by such legal counsel in connection with your obligations
hereunder.

     17. This instrument shall be binding upon and inure to the benefit of the
parties hereto and their respective successors and permitted assigns. It is
understood and agreed that references to "you" or "your" herein refer to the
original Escrow Agent and to any and all successor Escrow Agents. It is
understood and agreed that the Corporation may at any time or from time to time
assign its rights under the Agreement and these Joint Escrow Instructions in
whole or in part.

     18. This Agreement shall be governed by and interpreted and determined in
accordance with the laws of the State of California, as such laws axe applied by
California courts to contracts made and to be performed entirely in California
by residents of that state.

                                       3.
<PAGE>

                            Very truly yours,
                            LANDA MANAGEMENT SYSTEM CORPORATION

                            /s/ Stephen P. Kay

                            By: Stephen P. Kay, Chief Financial Officer
                            -------------------------------------------

                            PURCHASER:

                            /s/ Eugene Santa Cattarina

                            Eugene Santa Cattarina
                            -------------------------------------------

ESCROW AGENT:

/s/ Stephen P. Kay
---------------------------------
Stephen P. Kay, Company Secretary

                                       4

<PAGE>

                                   EXHIBIT D

                         FULL RECOURSE PROMISSORY NOTE

$ 96,666.00                                                      17TH MARCH 1999

     FOR VALUE RECEIVED, the undersigned hereby unconditionally promises to pay
to the order of Landa Management Systems Corporation, a California corporation
(the "Company"), at Chico, California, or at such other place as the holder
hereof may designate in writing, in lawful money of the United States of America
and in immediately available funds, the principal sum of Ninety nine thousand
six hundred sixty six 00/100 Dollars ($96,666.00) together with interest accrued
from the date hereof on the unpaid principal at the rate of 6.00% per annum, or
the maximum rate permissible by law (which under the laws of the State of
California shall be deemed to be the laws relating to permissible rates of
interest on commercial loans), whichever is less, as follows:

     Principal Repayment. The outstanding principal amount hereunder shall be
DUE AND PAYABLE IN FULL ON MARCH 16TH, 2006.

     Interest Payments. Interest shall be ACCRUED ANNUALLY and shall be
calculated on the basis of a 360-day year for the actual number of days elapsed;

provided, however, that in the event that the undersigned's employment by or
association with the Company is terminated for any reason prior to payment in
full of this Note, this Note shall be accelerated and all remaining unpaid
principal and interest shall become due and payable immediately after such
termination. Moreover, the Company may, in connection with the first
underwritten registration of the offering of any securities of the Company under
the Securities Act of 1933, as amended (the "Securities Act"), require that this
Note shall be accelerated and all remaining unpaid principal and interest shall
become due and payable within two hundred ten (210) days following the effective
date of the registration statement of the Company filed under the Securities
Act.

     If the undersigned fails to pay any of the principal and accrued interest
when due, the Company, at its sole option, shall have the right to accelerate
this Note, in which event the entire principal balance and all accrued interest
shall become immediately due and payable, and immediately collectible by the
Company pursuant to applicable law.

     This Note may be prepaid at any time without penalty. All money paid toward
the satisfaction of this Note shall be applied first to the payment of interest
as required hereunder and then to the retirement of the principal.

     This Note is a full recourse promissory note. The full amount of this Note
is secured by a pledge of shares of Common Stock of the Company, and is subject
to all of the terms and provisions of the Stock Purchase Agreement and the
Pledge Agreement, each of even date herewith between the undersigned and the
Company.

                                       1.
<PAGE>

     The undersigned hereby represents and agrees that the amounts due under
this Note are not consumer debt, and are not incurred primarily for personal,
family or household purposes, but are for business and commercial purposes only.

     The undersigned hereby waives presentment, protest and notice of protest,
demand for payment, notice of dishonor and all other notices or demands in
connection with the delivery, acceptance, performance, default or endorsement of
this Note.

     The holder hereof shall be entitled to recover, and the undersigned agrees
to pay when incurred, all costs and expenses of collection of this Note,
including without limitation, reasonable attorneys' fees.

     This Note shall be governed by, and construed, enforced and interpreted in
accordance with, the laws of the State of California, excluding conflict of laws
principles that would cause the application of laws of any other jurisdiction.

                                Signed: /s/ Eugene Santa Cattarina
                                       -----------------------------
                                       Eugene Santa Cattarina

                                       2.

<PAGE>

                                   EXHIBIT E

                                PLEDGE AGREEMENT

     1. As collateral security for the payment of that certain $96,666.00
promissory note issued this date to Landa Management Systems Corporation
("Pledgee") by the undersigned (hereinafter called "indebtedness"), the
undersigned hereby assigns, transfers to and pledges with the Pledgee the
securities listed on Schedule 1 hereto which were this day delivered to be
deposited with Pledgee, together with any stock rights, rights to subscribe,
dividends paid in cash or other property in connection with the complete or
partial liquidation of Pledgee, stock dividends, dividends paid in stock, new
securities or other property except cash dividends other than liquidating
dividends to which the undersigned is or may hereafter become entitled to
receive on account of such property, and in the event that the undersigned
receives any such, the undersigned will immediately deliver it to Pledgee to be
held by Pledgee hereunder in the same manner as the property originally pledged
hereunder. All property assigned, transferred to and pledged with Pledgee under
this paragraph is hereinafter called "collateral."

     At any time, without notice, and at the expense of the undersigned, Pledgee
in its name or in the name of its nominee or of the undersigned may, but shall
not be obligated to: (a) collect by legal proceedings or otherwise all dividends
(except cash dividends other than liquidating dividends), interest, principal
payments and ,other sums now or hereafter payable upon or on account of said
collateral; (b) enter into any extension, reorganization, deposit, merger, or
consolidation agreement,, or any agreement in any way relating to or affecting
the collateral, and in connection therewith may deposit or surrender control of
such collateral thereunder, accept other property in exchange for such
collateral and do and perform such acts and things as it may deem proper, and
any money or property received in exchange for such collateral shall be applied
to the indebtedness or thereafter held by it pursuant to the provisions hereof;
(c) insure, process and preserve the collateral; (d) cause the collateral to be
transferred to its name or to the name of its nominee; (e) exercise as to such
collateral all the rights, powers, and remedies of an owner, except that so long
as the indebtedness is not in default the undersigned shall retain all voting
rights as to the collateral.

     The undersigned agrees to pay prior to delinquency all taxes, charges,
liens and assessments against the collateral, and upon the failure of the
undersigned to do so Pledgee at its option may pay any of them and shall be the
sole judge of the legality or validity thereof and the amount necessary to
discharge the same.

     All advances, charges, costs and expenses, including reasonable attorneys'
fees, incurred or paid by Pledgee in exercising any right, power or remedy
conferred by this agreement, or in the enforcement thereof, shall become a part
of the indebtedness secured hereunder and shall be paid to Pledgee by the
undersigned immediately and without demand.

     At the option of Pledgee and without necessity of demand or notice, all or
any part of the indebtedness of the undersigned shall immediately become due and
payable irrespective of any agreed maturity, upon the happening of any of the
following events: (a) failure to keep or perform any of the terms or provisions
of this agreement; (b) default in the payment of principal or interest when due;
(c) the levy of any attachment, execution or other process against the

                                       1.
<PAGE>

collateral; or (d) the insolvency, commission of an act of bankruptcy, general
assignment for the benefit of creditors, filing of any petition in bankruptcy or
for relief under the provisions of Title 11, United States Code, Bankruptcy, of,
by, or against the undersigned.

     In the event of the nonpayment of any indebtedness when due, whether by
acceleration or otherwise, or upon the happening of any of the events specified
in the last preceding paragraph, Pledgee may then, or at any time thereafter, at
its election, apply, set off, collect or sell in one or more sales, or take such
steps as may be necessary to liquidate and reduce to cash in the hands of
Pledgee in whole or in part, with or without any previous demands or demand of
performance or notice or advertisement, the whole or any part of the collateral
in such order as Pledgee may elect, and any such sale may be made either at
public or private sale at its place of business or elsewhere, or at any broker's
board or securities exchange, either for cash or upon credit or for future
delivery; provided, however, that if such disposition is at private sale, then
the purchase price of the collateral shall be equal to the public market price
then in effect, or, if at the time of sale no public market for the collateral
exists, then, in recognition of the fact that the sale of the collateral would
have to be registered under the Securities Act of 1933 and that the expenses of
such registration are commercially unreasonable for the type and amount of
collateral pledged hereunder; Pledgee and the undersigned hereby agree that such
private sale shall be at a purchase price mutually agreed to by Pledgee and the
undersigned or, if the parties cannot agree upon a purchase price, then at a
purchase price established by a majority of three independent appraisers
knowledgeable of the value of such collateral, one named by the undersigned
within 10 days after written request by the Pledgee to do so, one named by
Pledgee within such 10 day period, and the third named by the two appraisers so
selected, with the appraisal to be rendered by such body within 30 days of the
appointment of the third appraiser. The cost of such appraisal, including all
appraiser's fees, shall be charged against the proceeds of sale as an expense of
such sale. Pledgee may be the purchaser of any or all collateral so sold and
hold the same thereafter in its own right free from any claim of the undersigned
or right of redemption. Demands of performance, notices of sale, advertisements
and presence of property at sale are hereby waived, and Pledgee is hereby
authorized to sell hereunder any evidence of debt pledged to it. Any sale
hereunder may be conducted by any officer or agent of Pledgee.

     The proceeds of the sale of any of the collateral and all sums received or
collected by Pledgee from or on account of such collateral shall be applied by
Pledgee to the payment of expenses incurred or paid by Pledgee in connection
with any sale, transfer or delivery of the collateral, to the payment of any
other costs, charges, attorneys' fees or expenses mentioned herein, and to the
payment of the indebtedness or any part hereof, all in such order and manner as
Pledgee in its discretion may determine. Pledgee shall pay any balance to the
undersigned.

     Pledgee shall be under no duty or obligation whatsoever to make or give any
presentments, demands for performance, notices of non-performance, protests,
notices of protest or notices of dishonor in connection with any obligations or
evidences of indebtedness held by Pledgee as collateral, or in connection with
any obligations or evidences of indebtedness which constitute in whole or in
part the indebtedness secured hereunder.

     Pledgee may at any time deliver the collateral or any part thereof to the
undersigned and the receipt of the undersigned shall be a complete and full
acquittance for the collateral so delivered, and Pledgee shall thereafter be
discharged from any liability or responsibility therefor.

                                       2.
<PAGE>

     Upon the transfer of all or any part of the indebtedness Pledgee may
transfer all or any part of the collateral and shall be fully discharged
thereafter from all liability and responsibility with respect to such collateral
so transferred, and the transferee shall be vested with all the rights and
powers of Pledgee hereunder with respect to such collateral so transferred; but
with respect to any collateral not so transferred Pledgee shall retain all
rights and powers hereby given.

     Until all indebtedness shall have been paid in full the power of sale and
all other rights, powers and remedies granted to Pledgee hereunder shall
continue to exist and may be exercised by Pledgee at any time and from time to
time irrespective of the fact that the indebtedness or any part thereof may have
become barred by any statute of limitations, or that the personal liability of
the undersigned may have ceased.

     Pledgee agrees that so long as the indebtedness is not in default, shares
of Landa Management Systems Corporation common stock held hereunder as
collateral for the indebtedness shall be released from pledge as the
indebtedness is paid. Such releases shall be at the rate of one share for -each
$0.12 of principal amount of indebtedness paid. Release from pledge, however,
shall not result in release from the provisions of those certain Joint Escrow
Instructions, if any, of even date herewith among the parties to this Pledge
Agreement and the Escrow Agent named therein or from the Repurchase Option of
Landa Management Systems Corporation, set forth in the Stock Purchase Agreement
dated 17th March 1999, if any, between the parties to this Pledge Agreement.

     The rights, powers and remedies given to Pledgee by this agreement shall be
in addition to all rights, powers and remedies given to Pledgee by virtue of any
statute or rule of law. Pledgee may exercise its Pledgee's lien or right of
setoff with respect to the indebtedness in the same manner as if the
indebtedness were unsecured. Any forbearance or failure or delay by Pledgee in
exercising any right, power or remedy hereunder shall not be deemed to be a
waiver of such right, power or remedy, and any single or partial- exercise of
any right, power or remedy hereunder shall not preclude the further exercise
thereof; and every right, power and remedy of Pledgee shall continue in full
force and effect until such right, power or remedy is specifically waived by an
instrument in writing executed by Pledgee.

         Dated: 17th March 1999

                        /s/ Eugene Santa Cattarina
                        -----------------------------------
                        Eugene Santa Cattarina

ATTACHMENT: Schedule 1

                                       3.

<PAGE>

                                   SCHEDULE I
                                       TO
                                PLEDGE AGREEMENT

805,550 shares of Common Stock in Landa Management Systems Corporation.

<PAGE>
                                                                LANDACORP (LOGO)
                                                    Healthcare managment systems

Section 83(B)

elects, pursuant to the provisions of Sections 55-56 and 83(b) of ode of 1986,
as amended (the "Code"), to include in alternative )me for the undersigned's
current taxable year, as compensation for any, of the fair market value of
the property described below at the he amount paid for such property. The
undersigned also elects o(b) of the Code to include in gross income for the
taxable year in i disposes of some or all of the property described below in a a
to satisfy the requirements of Section 422(a)(1) of the Code (a), as
compensation for services, the excess, if any, of the fair market value of the
disposed property at the time of transfer to the undersigned over the amount
paid for such property.

Pursuant to Treasury Regulations Section 1.83-2, the following information is
submitted:
Name:                 Eugene Santa Cattarina ("Purchaser")
Address:              540 Chestnut Rose Lane, Atlanta, GA 30327
Social Security No.:  ###-##-####
Property Description: 805,550 shares of Common stock (the "Stock") of
                      Landa Management Systems Corporation (the "Corporation").
The date on which the Stock was purchased is 17" March 1999.
The taxable year for which the election is made is the calendar year
1999/the fiscal year ending 31 St December 1999:
Restrictions:         "If, on or before 19'h July 2002 the employment of
                      the Purchaser by the Corporation terminates for any
                      reason, the Corporation shall have the option to
                      repurchase some or all of the Stock (depending upon
                      the date of such termination) for a price equal to
                      the cost of the Stock repurchased."
The fair market value at the time of transfer of the Stock, determined without
regard to any restriction other than a restriction which by its terms will never
lapse, is $96,666:00. (805,550 shares having.a fair market value of $0.12 per
share).
Purchase Price:       $96,666.00 (805,550 shares at $0.12 per share).

A copy of this statement has been furnished to the Corporation and the
transferee of the Stock if different than Purchaser.

Very truly yours,

                                        /s/ Eugene Santa Cattarina
                                        EUGENE SANTA CATTARINA

Landa Management Systems Corporation

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