Document:

EXHIBIT 4.2

                  PROMISSORY NOTE AND WARRANT OPTION AGREEMENT

$25,000.00                      August 8, 2000                Lake Mary, Florida

         FOR VALUE RECEIVED,  Bio-One  Corporation a Nevada Corporation with its
principal place of business located at Lake Mary, Florida (herein referred to as
"Maker"),  promises to pay to the order of Kevin Thomas,  his heirs,  executors,
administrators,  successors,  and assigns (hereinafter referred to as "Holder"),
the principal sum of Twenty-five  thousand  Dollars  ($25,000.00)  together with
interest on the unpaid principal  balance at the interest rate of twelve percent
(12%) per annum.  The accrued interest and principle shall be due and payable in
full on the 30th day of November, 2000.

         This Note shall be payable at 4365 Arnold Avenue, Naples, Florida 34104
or such other place or places as the Holder may, from time to time, designate in
writing.  Maker has the  privilege  of  payment of all or any part of the unpaid
balance of the  principal  and accrued  interest at any time without  penalty or
premium.

         Holder has the  warrant  option to convert  any  portion of this unpaid
note into stock  within ten (10) days of notice to the Maker.  In the event that
the Holder  elects  this  option,  then the Maker  shall  issue  shares of stock
sufficient to represent one share per twenty-five (25) cents of investment.

         By signature hereon, the undersigned  certifies that this loan has been
made for the purpose of working capital.

         IT WITNESS WHEREOF, Maker has caused this Note to be executed,  sealed,
and the same to be delivered to Holder on its behalf,  all as of the date and at
the place first stated above.

                                         MAKER:

                                         BIO-ONE CORPORATION

                                         By: /s/ Armand Dauplaise         (Seal)
                                             --------------------------------
                                             Armand Dauplaise, PresidentEXHIBIT 10.1

THE SECURITIES  WHICH ARE THE SUBJECT OF THIS AGREEMENT HAVE NOT BEEN REGISTERED
UNDER THE  SECURITIES  ACT OF 1933 (THE "1933 ACT"),  NOR  REGISTERED  UNDER ANY
STATE SECURITIES LAW, AND ARE "REGISTERED SECURITIES" AS THAT TERM IS DEFINED IN
RULE 144 UNDER THE 1933 ACT.  THE  TRANSFERRED  EXCEPT  PURSUANT TO AN EFFECTIVE
REGISTRATION  STATEMENT  UNDER THE 1933 ACT, OR PURSUANT  TO AN  EXEMPTION  FROM
REGISTRATION  UNDER THE 1933 ACT, THE AVAILABILITY OF WHICH IS TO BE ESTABLISHED
TO THE SATISFACTION OF THE COMPANY.

                       AGREEMENT FOR THE EXCHANGE OF STOCK

     AGREEMENT  made  this  30  day  of  May,  2000,  by  and  between   Bio-One
Corporation, a Nevada corporation, (hereinafter referred to as the "ISSUER") and
Crown Enterprises, Inc. and the individuals listed in Exhibit A attached hereto,
(the  "SHAREHOLDERS"),  which SHAREHOLDERS own all of the issued and outstanding
shares of Crown Enterprises, Inc., a Florida corporation. ("CEI")

     In  consideration of the mutual promises,  covenants,  and  representations
contained herein, and other good and valuable consideration,

         THE PARTIES HERETO AGREE AS FOLLOWS:

     1.  EXCHANGE OF  SECURITIES.  Subject to the terms and  conditions  of this
Agreement, the ISSUER agrees to issued to SHAREHOLDERS, 10,000,000 shares of the
common stock of ISSUER, $0.001 par value (the "Shares"), in exchange for 100% of
the issued and  outstanding  shares of CEI,  such that CEI shall become a wholly
owned subsidiary of the ISSUER.

     2.  REPRESENTATIONS  AND  WARRANTIES.  ISSUER  represents  and  warrants to
SHAREHOLDERS and CEI the following:

          i.  Organization.  ISSUER is a  corporation  duly  organized,  validly
     existing,  and in good  standing  under the laws of  Dealware,  and has all
     necessary  corporate powers to own properties and carry on a business,  and
     is duly  qualified  to do business and is in good  standing in Nevada.  All
     actions taken by the ISSUER have been valid and in accordance with the laws
     of the State of Nevada.

          ii.  Capital  The  authorized  capital  stock of  ISSUER  consists  of
     20,000,000  shares of common stock,  $0.001 par value, of which  11,700,000
     are issued and  outstanding,  and 1,000,000  shares of preferred stock, par
     value $.001,  none of which are issued.  All  outstanding  shares are fully
     paid and non assessable, free of liens, encumbrances, options, restrictions
     and legal or equitable  rights of others not a party to this Agreement.  At
     closing,  there  will be no  outstanding  subscriptions,  options,  rights,
     warrants,  convertible  securities,  or  other  agreements  or  commitments
     obligating  ISSUER to issue or transfer from treasury any additional shares
     of its

<PAGE>

     capital stock. None of the outstanding  shares of ISSUER are subject to any
     stock restriction agreements.  All of the shareholders of ISSUER have valid
     title to such shares and acquired their shares in a lawful  transaction and
     in accordance with the laws of Nevada.

          iii.  Financial  Statements.  Exhibit B to this Agreement includes the
     balance sheet of ISSUER as of May 31, 2000,  and the related  statements of
     income and  retained  earnings  for the period  then ended.  The  financial
     statements  have  been  prepared  in  accordance  with  generally  accepted
     accounting  principles  consistently  followed  by  ISSUER  throughout  the
     periods  indicated,  and fairly present the financial position of ISSUER as
     of the date of the  balance  sheet  in the  financial  statements,  and the
     results of its operations for the periods indicated.

          iv.  Absence of Changes.  Since the date of the financial  statements,
     there has not been any change in the  financial  condition or operations of
     ISSUER,  except changes in the ordinary  course of business,  which changes
     have not in the aggregate been materially adverse.

          v.  Liabilities.   ISSUER  does  not  have  any  debt,  liability,  or
     obligation  of  any  nature,  whether  accrued,  absolute,  contingent,  or
     otherwise,  and  whether due or become due,  that is not  reflected  on the
     ISSUER'S  financial  statement.   ISSUER  is  not  aware  of  any  pending,
     threatened or asserted claims,  lawsuits or contingencies  involving ISSUER
     or its common stock. There is no dispute of any kind between ISSUER and any
     third  party,  and no  such  dispute  will  exist  at the  closing  of this
     Agreement.  At closing,  ISSUER will be free from any and all  liabilities,
     liens, claims, and/or commitments.

          vi. Ability to Carry Out Obligations. ISSUER has the right, power, and
     authority to enter into and perform its  obligations  under this Agreement.
     The execution and delivery of this Agreement by ISSUER and the  performance
     by ISSUER of its  obligations  hereunder  will not  cause,  constitute,  or
     conflict  with or  result  in (a) any  breach  or  violation  or any of the
     provisions  of or  constitute  a  default  under  any  license,  indenture,
     mortgage, charter, instrument,  articles of incorporation,  bylaw, or other
     agreement or instrument to which ISSUER or its shareholders are a party, or
     by which they may be bound, nor will any consents or  authorizations of any
     party other than those  hereto be  required,  (b) an event that would cause
     ISSUER to be liable to any party,  or (c) an event that would result in the
     creation or imposition or any lien,  charge or  encumbrance on any asset of
     ISSUER or upon the securities of ISSUER to be acquired by SHAREHOLDERS.

          vii. Full Disclosure.  None of the representations and warranties made
     by the ISSUER,  or in any  certificate  or  memorandum  furnished  or to be
     furnished by the ISSUER, contains or will contain any untrue statement of a
     material  fact,  or omit any  material  fact the omission of which would be
     misleading.

          viii.  Contract and Leases.  ISSUER is not  currently  carrying on any
     business and is not a party to any contract,  agreement or lease. No person
     holds a power of attorney from ISSUER.

          ix.  Compliance  with Laws.  ISSUER has complied  with,  and is not in
     violation of any federal,  state, or local statute,  law, and/or regulation
     pertaining to ISSUER. ISSUER has

<PAGE>

     complied with all federal and state  securities laws in connection with the
     issuance, sale and distribution of its securities.

          x.  Litigation.  ISSUER is not (and has not been) a party to any suit,
     action,  arbitration,  or legal,  administrative,  or other proceeding,  or
     pending  governmental  investigation.  To the best knowledge of the ISSUER,
     there is no basis for any such action or  proceeding  and no such action or
     proceeding is threatened  against ISSUER and ISSUER is not subject to or in
     default  with  respect to any  order,  writ,  injunction,  or decree of any
     federal,   state,   local,  or  foreign  court,   department,   agency,  or
     instrumentality.

          xi.  Conduct of Business.  Prior to the closing,  ISSUER shall conduct
     its  business  in the normal  course,  and shall not (1) sell,  pledge,  or
     assign any assets (2) amend its Articles of  Incorporation  or Bylaws,  (3)
     declare dividends,  redeem or sell stock or other securities, (4) incur any
     liabilities, (5) acquire or dispose of any assets, enter into any contract,
     guarantee  obligations  of any third  party,  or (6)  enter  into any other
     transaction.

          xii. Corporate  Documents.  Copies of each of the following documents,
     which are true,  complete  and correct in all  material  respects,  will be
     attached to and made a part of this Agreement:

          1.   Articles of Incorporation;
          2.   Bylaws;
          3.   Minutes of Shareholders Meetings;
          4.   Minutes of Directors Meetings;
          5.   List of Officers and Directors;
          6.   Balance Sheet as of May 31, 2000  together  with other  financial
               statements described in Section 2 (iii);
          7.   Stock  register  and  stock  records  of  ISSUER  and a  current,
               accurate list of ISSUER's shareholders.

          xiii. Documents.  All minutes,  consents or other documents pertaining
     to ISSUER to be delivered at closing shall be valid and in accordance  with
     the laws of Nevada.

          xiv.  Title.  The  Shares  to be issued  to  SHAREHOLDERS  will be, at
     closing, free and clear of all liens, security interests, pledges, charges,
     claims and  encumbrances  of any kind.  None of such  Shares are or will be
     subject to any voting trust or agreement.  No person holds or has the right
     to receive any proxy or similar  instrument  with  respect to such  shares,
     except as  provided  in this  Agreement,  the  ISSUER is not a party to any
     agreement  which  offers or grants to any person the right to  purchase  or
     acquire any of the  securities  to be issued to  SHAREHOLDERS.  There is no
     applicable local, state or federal law, rule,  regulation,  or decree which
     would  result  of the  issuance  of the  Shares  to  SHAREHOLDERS,  impair,
     restrict, or delay SHAREHOLDERS' voting rights with respect to the Shares.

     3. SHAREHOLDERS and CEI represent and warrant to ISSUER the following:

          i.  Organization.   CEI  is  a  corporation  duly  organized,  validly
     existing,  and in good  standing  under  the laws of  Arizona,  and has all
     necessary  corporate powers to own properties and carry on a business,  and
     is duly qualified to do business and is in good standing in

<PAGE>

     Arizona. All actions taken by the Incorporators, directors and shareholders
     of CEI have  been  valid  and in  accordance  with the laws of the State of
     Arizona.

          ii. Shareholder and Issued Stock.  Exhibit A annexed hereto sets forth
     the names and share holdings of 100% of CEI's shareholders.

          iii.  Listing  Stock for Trading Upon  closing,  SHAREHOLDERS  and CEI
     shall take all steps reasonably  necessary to get the ISSUER's common stock
     listed for  trading  in NASD  Automated  Bulletin  Board and to, as soon as
     practicably  possible,  have the company  listed with Standard and Poors or
     Moodys in their Accelerated Corporate Report.

          iv. Counsel.  SHAREHOLDERS and CEI represent and warrant that prior to
     Closing,  that they are represented by independent  counsel or have had the
     opportunity  to  retain  independent  counsel  to  represent  them  in this
     transaction  and that  prior to  Closing,  the law  offices  of  Donald  F.
     Mintmire & Associates has acted as exclusive  counsel to the ISSUER and has
     not represented either the SHAREHOLDERS or CEI in any manner whatsoever.

          v. Consents.  SHAREHOLDERS  and CEI represent and warrant that 100% of
     shareholders of CEI have consented to and authorized the Board of Directors
     of CEI to enterinto and execute this agreement.

     4.  INVESTMENT  INTENT.  SHAREHOLDERS  agrees that the Shares  being issued
pursuant  to this  Agreement  may be sold,  pledged,  assigned,  hypothecate  or
otherwise  transferred,  with or  without  consideration  (a  "Transfer"),  only
pursuant to an effective registration statement under the Act, or pursuant to an
exemption from  registration  under the Act, the  availability of which is to be
established to the  satisfaction of ISSUER.  SHAREHOLDERS  agrees,  prior to any
Transfer,  to give written notice to ISSUER  expressing his desire to effect the
transfer and describing the proposed transfer.

     5. CLOSING. The execution of this agreement by all signatories  constitutes
the closing of this  transaction  and this agreement  .shall be binding upon the
parties thereafter.

     6. DOCUMENTS TO BE DELIVERED AT CLOSING.

          i. By the ISSUER

               (1) Board of  Directors  Minutes  authorizing  the  issuance of a
          certificate or certificates for 10,000,000  Shares,  registered in the
          names of the SHAREHOLDERS equal to their pro-rata holdings in CEI.

               (2) The resignation of all officers of ISSUER.

               (3) A Board of  Directors  resolution  appointing  such person as
          SHAREHOLDERS designate as a director(s) of ISSUER.

<PAGE>

               (4) The  resignation  of all of the  directors of ISSUER,  except
          that of  SHAREHOLDER'S  designee,  sated  subsequent to the resolution
          described in 3, above.

               (5) Unaudited financial statements of ISSUER, which shall include
          a balance sheet dated as of May 31, 2000 and statements of operations,
          stockholders equity and cash flows for the twelve month period ended.

               (6)  All  of  the  business  and  corporate  records  of  ISSUER,
          including but not limited to  correspondence  files,  bank statements,
          checkbooks, savings account books, minutes of shareholder and director
          meetings,  financial statements,  shareholder listings, stock transfer
          records, agreements and contracts.

               (7) Such other minutes of ISSUER's  shareholders  or directors as
          may reasonably be required by SHAREHOLDERS.

               (8) An Opinion  Letter from  ISSUER'S  Attorney  attesting to the
          validity and condition of the ISSUER.

          ii. By SHAREHOLDER AND CEI:

               (1)  Delivery  to  the  Issuer,   to  its  Transfer  Agent,   the
          certificates  representing 100% of the issued and outstanding stock of
          CEI.

     7. REMEDIES.

          i.  Arbitration.  Any controversy or claim arising out of, or relating
     to, this Agreement, or the making,  performance, or interpretation thereof,
     shall be settled by arbitration in Palm Beach County, Florida in accordance
     with  the  Commercial   Arbitration  Rules  of  the  American   Arbitration
     Association then existing. The arbitrator assigned shall have the authority
     and power to decide all  arbitratible  issues.  Judgment on the arbitration
     award may be  entered in any court  having  jurisdiction  over the  subject
     matter of  controversy.  The prevailing  party in such claim or controversy
     shall be  entitled  to  recover  all costs and  expenses  of such  claim or
     controversy, including attorneys fees from the non-prevailing party.

     8. MISCELLANEOUS.

          i.  Captions  and  Headings.   The  Article  and  paragraph   headings
     throughout this Agreement are for convenience and reference only, and shall
     in now  way be  deemed  to  define,  limit,  or add to the  meaning  of any
     provision of this Agreement.

          ii. No Oral change.  This Agreement and any provision herein,  may not
     be  waived,  changed,  modified,  or  discharged  orally,  but  only  by an
     agreement in writing  signed by the party against whom  enforcement  of any
     waiver, change modification, or discharge is sought.

          iii. Non Waiver. Except as otherwise provided herein, no waiver of any
     covenant, condition, or provision of this Agreement shall be deemed to have
     been made unless

<PAGE>

     expressly  in writing and signed by the party  against  whom such waiver is
     charged;  and (I) the  failure  of any  party to  insist in any one or more
     cases  upon  the  performance  of  any  of the  provisions,  covenants,  or
     conditions  of this  Agreement or to exercise any option  herein  contained
     shall not be construed as a waiver or relinquishment  for the future of any
     such  provisions,   covenants,  or  conditions,   (ii)  the  acceptance  of
     performance  of anything  required by this  Agreement to be performed  with
     knowledge of the breach or failure of a covenant,  condition,  or provision
     hereof shall not be deemed a waiver of such breach or failure, and (iii) no
     waiver by any party of one breach by another  party shall be construed as a
     waiver with respect to any other or subsequent breach.

          iv. Time of Essence.  Time is of the essence of this  Agreement and of
     each and every provision hereof.

          v. Entire Agreement.  This Agreement contains the entire Agreement and
     understanding   between  the  parties  hereto,  and  supersedes  all  prior
     agreements and understandings.

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

          vii. Notices. All notices, requests, demands, and other communications
     under this  Agreement  shall be in writing and shall be deemed to have been
     duly given on the date of service if served personally on the party to whom
     notice is to be given,  or on the third day after  mailing if mailed to the
     party to whom notice is to be given,  by first class  mail,  registered  or
     certified, postage prepaid, and properly addressed, and by fax, as follows:

   ISSUER:                            Dale B. Finfrock
                                      P.O. Box 669
                                      Palm Beach, FL 33480

   With a copy to:                    Donald F. Mintmire, Esquire
                                      265 Sunrise Avenue, Suite 204,
                                      Palm Beach, FL 33480

   CEI:                               Armand Dauplaise
                                      290 Waymont Ct. (suite 120)
                                      Lake Mary, FL 32746

     IN WITNESS WHEREOF, the undersigned has executed this Agreement this 30 day
of May, 2000.

BIO-ONE CORPORATION                          CROWN ENTERPRISES, INC.

By: /s/ Dale B. Finfrock                     By: /s/ Armand Dauplaise
-------------------------                   -----------------------------
Dale B. Finfrock, President                   Armand Dauplaise, President

<PAGE>

                                    EXHIBIT A

                        SHAREHOLDERS OF CROWN ENTERPRISES

NAME                              SHARES

Kevin Lockhart                 4,597,500
Armand Dauplaise               4,597,500
Richard Wilson                   250,000
Charles Hudson                   250,000
Scott Sieck                      120,000
Suzanne DiStefano                100,000
Conrad Harper                     25,000
James & Phyllis Lowe              20,000
Shirley Weaver                    20,000
Ron Sheffron                      20,000
Total                         10,000,000

<PAGE>

                                    EXHIBIT B

                               BIO-ONE CORPORATION
                                  Balance Sheet
                                  May 31, 2000

                                     ASSETS

<TABLE>
<S>                                                        <C>
Current Assets:
         Cash                                                 $-0-

         Organizational Costs                              $16,000

                  Total Assets                             $16,000

                              SHAREHOLDERS' EQUITY

Shareholder's Equity:
         Common Stock, par value $.001 per share;
         20,000,000 shares authorized,
         11,700,000 shares issued and outstanding          $11,700

         Additional paid-in-capital                          4,300

                  Total Shareholder's Equity               $16,000
</TABLE>

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