Document:

EXHIBIT 10.4

                               MEDICOR FOUNDATION
                        c/o Jura Trust Aktiengesellschaft
                                  Haus Gafadura
                                  Mitteldorf 1
                                  Postfach 838
                                  FL-9490 Vaduz
                                  Liechtenstein

Westport Investments Limited
Lyford Manor
Lyford Cay
P O Box N-7776
Nassau, Bahamas

Gentlemen:

     The Council of Medicor is extremely grateful to the Board of Westport
Investments for the most generous gift of shares in Westport Resources
Corporation.

Although Medicor Foundation is an independent charitable foundation obliged by
its statutes to pursue purely charitable works we also obviously have an
obligation to ensure that the investments and assets owned by the Foundation
provide for that charitable responsibility efficiently. We therefore wish to see
that this holding in Westport Resources is managed in accordance with that
responsibility.

We understand that until now your wholly-owned subsidiary, Westport Energy LLC,
has been a party to a Shareholders Agreement between the other two major
shareholders and the Company. We have been advised that this Agreement has had
to be modified for the purposes of the gift you have made to us so that we
become a party to the agreement.

Having considered matters carefully we have come to the conclusion that it would
be in the best interest of Medicor Foundation, and we believe Westport
Investments, to enter into an agreement so that we act jointly in relation to
any action required as regards the Westport Resources stock which will now be
held, directly or indirectly, by both of us.

In the circumstances this letter is to reflect our agreement as to the voting of
shares and other matters that may arise under the Third Amended and Restated
Shareholders Agreement among Westport Resources Corporation, the undersigned,
you, in your capacity as manager of Westport Energy LLC and the other parties
named therein.

The Shareholders Agreement provides for the voting of shares by the shareholders
of Westport Resources Corporation in order to maintain the specified composition
of the board of directors,

                                      -1-

<PAGE>

which includes three directors who are appointed specifically to represent the
total shareholding currently held by Westport Investments (through Westport
Energy LLC) and Medicor Foundation. You and we hereby agree to vote or cause to
be voted all shares of Westport Resources Corporation held separately by each of
us to maintain such board composition, and purely for the sake of administrative
convenience, you have granted Medicor Foundation the power to vote all of your
shares for this purpose.

However, each of us retains the power independently to vote and dispose of its
shares of Westport Resources Corporation stock.

In addition, each of Medicor Foundation and Westport Investments agrees to vote
or cause to be voted its shares of Westport Resources Corporation stock, such
that the parties will have board representation as follows:

     (i)    so long as Westport Energy LLC and Medicor Foundation have the right
            to designate three directors under the Shareholders Agreement (by
            reason of their owning in the aggregate 18% or more of the Company's
            then outstanding common stock) then Westport Investments shall have
            the right to designate one director and Medicor Foundation shall
            have the right to designate two directors;

     (ii)   so long as Westport Energy LLC and Medicor have the right to
            designate two directors under the Shareholders Agreement (by reason
            of their aggregate ownership falling below 18%) Medicor shall have
            the right to designate both directors; and

     (iii)  so long as Westport Energy LLC and Medicor have the right to
            designate one director under the Shareholders Agreement (by reason
            of their aggregate ownership falling below 8%), Medicor shall have
            the right to designate such director.

The Shareholders Agreement also provides for the approval by the shareholders of
Westport Resources Corporation of certain corporate actions and transactions.
Medicor Foundation agrees to consult with Westport Energy LLC as to all such
matters in advance of granting any such consent or approval.

The parties agree to cooperate as to any other matters that may arise under the
Shareholders Agreement and in connection with the donation of Westport Resources
Corporation stock to Medicor Foundation, including any required filings with the
United States Securities and Exchange Commission.

                           (signature page to follow)

                                      -2-

<PAGE>

                                MEDICOR FOUNDATION

                                By: /s/ Ursula Haas
                                    -----------------------------------
                                    Name:   Ursula Haas
                                    Title:  President
                                    Date:   February 14, 2003

                                By: /s/ Michael Russell
                                    ------------------------------------
                                    Name:   Michael Russell
                                    Title:  Member of Council
                                    Date:   February 14, 2003

Agreed:

WESTPORT ENERGY LLC

By:  WESTPORT INVESTMENTS LIMITED, Manager

By:  /s/ Robert A. Haas
     -----------------------------------------
     Name:  Robert A. Haas
     Title: Vice President
     Date:  February 14, 2003EXHIBIT 10.5

                            LOCK-UP LETTER AGREEMENT

LEHMAN BROTHERS INC.
CREDIT SUISSE FIRST BOSTON CORPORATION
JPMORGAN SECURITIES INC.

As Representatives of the several
Underwriters named in Schedule 1
to the Underwriting Agreement,
c/o Lehman Brothers Inc.
745 Seventh Avenue
New York, New York 10019

Dear Sirs:

     The undersigned understands that you and certain other firms propose to
enter into an Underwriting Agreement (the "Underwriting Agreement") providing
for the purchase by you and such other firms (the "Underwriters") of shares (the
"Shares") of Common Stock, par value $.01 per share (the "Common Stock"), of
Westport Resources Corporation, a Nevada corporation (the "Company"), and that
the Underwriters propose to reoffer the Shares to the public (the "Offering").

     In consideration of the execution of the Underwriting Agreement by the
Underwriters, and for other good and valuable consideration, the undersigned
hereby irrevocably agrees that, without the prior written consent of Lehman
Brothers Inc., on behalf of the Underwriters, the undersigned will not, directly
or indirectly, (1) offer for sale, sell, pledge, or otherwise dispose of (or
enter into any transaction or device that is designed to, or could be expected
to, result in the disposition by any person at any time in the future of) any
shares of Common Stock (including, without limitation, shares of Common Stock
that may be deemed to be beneficially owned by the undersigned in accordance
with the rules and regulations of the Securities and Exchange Commission and
shares of Common Stock that may be issued upon exercise of any option or
warrant) or securities convertible into or exchangeable for Common Stock (other
than the Shares) owned by the undersigned on the date of execution of this
Lock-Up Letter Agreement or on the date of the completion of the Offering, or
(2) enter into any swap or other derivatives transaction that transfers to
another, in whole or in part, any of the economic benefits or risks of ownership
of such shares of Common Stock, whether any such transaction described in clause
(1) or (2) above is to be settled by delivery of Common Stock or other
securities, in cash or otherwise, for a period of 90 days after the date of the
final Prospectus Supplement (as defined in the Underwriting Agreement) relating
to the Offering.

                                      -1-

<PAGE>

     In furtherance of the foregoing, the Company and its Transfer Agent are
hereby authorized to decline to make any transfer of securities if such transfer
would constitute a violation of breach of this Lock-Up Letter Agreement.

     It is understood that, if the Company notifies you that it does not intend
to proceed with the Offering, if the Underwriting Agreement does not become
effective, or if the Underwriting Agreement (other than the provisions thereof
which survive termination) shall terminate or be terminated prior to payment for
and delivery of the Shares, the undersigned will be released from his or her
obligations under this Lock-Up Letter Agreement.

     The undersigned understands that the Company and the Underwriters will
proceed with the Offering in reliance on this Lock-Up Letter Agreement.

     Whether or not the Offering actually occurs depends on a number of factors,
including market conditions. Any Offering will only be made pursuant to an
Underwriting Agreement, the terms of which are subject to negotiation between
the Company and the Underwriters.

     The undersigned hereby represents and warrants that the undersigned has
full power and authority to enter into this Lock-Up Letter Agreement and that,
upon request, the undersigned will execute any additional documents necessary in
connection with the enforcement hereof.

     Any obligations of the undersigned shall be binding upon the heirs,
personal representatives, successors and assigns of the undersigned.

                                Very truly yours,

                                By: /s/ Michael Russell
                                    -----------------------------------------
                                    Name:  Michael Russell
                                    Title: Authorized Signatory
                                           Westport Investments
                                           Managing member of
                                           Westport Energy, LLC

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

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