Document:

<PAGE>
                                                                   EXHIBIT 10.7

                                    AMENDMENT
                                       TO
                         OPTION TO PURCHASE COMMON STOCK

         THIS AMENDMENT (the "Amendment") to the Option to Purchase Common Stock
(the "Option"), dated August 4, 2003, issued to Joseph M. Fioravanti (the
"Holder") to purchase 200,000 shares of common stock, par value $.001, of
Continental Southern Resources, Inc., a Nevada corporation (the "Company"), is
made and entered into February 26, 2004. Capitalized terms not otherwise defined
herein shall have the meanings ascribed to such terms in the Option.

                                    RECITALS

         WHEREAS, the parties hereto desire to amend the Option to delete
Section 3.3(a).

         NOW, THEREFORE, in consideration of the foregoing premises, and for
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, and intending to be legally bound hereby, the parties
hereto hereby agree as follows:

         1.       Section 3.3(a) is hereby deleted in its entirety.

         2.       Except as expressly provided herein, the Option shall remain
in full force and effect.

         3. This Amendment may be executed in counterpart, each of which shall
be deemed to be an original, and both of which together shall constitute one and
the same agreement.

         IN WITNESS WHEREOF, the Holder and the Company have caused this
Amendment to be signed by their respective officers hereunto duly authorized,
all as of the date first written above.

                                       CONTINENTAL SOUTHERN RESOURCES, INC.

                                       By:  /s/ STEPHEN P. HARRINGTON
                                            -----------------------------------
                                       Name:
                                       Title:

                                       /s/ JOSEPH M. FIORAVANTI
                                       ----------------------------------------
                                       Joseph M. Fioravanti<PAGE>
                                                                   EXHIBIT 10.8

                                    AMENDMENT
                                       TO
                              AMENDED AND RESTATED

                         OPTION TO PURCHASE COMMON STOCK

         THIS AMENDMENT (the "Amendment") to the Amended and Restated Option to
Purchase Common Stock (the "Option"), dated August 8, 2003, issued to
____________________ (the "Holder") to purchase 100,000 shares of common stock,
par value $.001, of Continental Southern Resources, Inc., a Nevada corporation
(the "Company"), is made and entered into February 26, 2004. Capitalized terms
not otherwise defined herein shall have the meanings ascribed to such terms in
the Option.

                                    RECITALS

         WHEREAS, the parties hereto desire to amend the Option to delete
Section 3.3(a).

         NOW, THEREFORE, in consideration of the foregoing premises, and for
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, and intending to be legally bound hereby, the parties
hereto hereby agree as follows:

         1.       Section 3.3(a) is hereby deleted in its entirety.

         2.       Except as expressly provided herein, the Option shall remain
in full force and effect.

         3. This Amendment may be executed in counterpart, each of which shall
be deemed to be an original, and both of which together shall constitute one and
the same agreement.

         IN WITNESS WHEREOF, the Holder and the Company have caused this
Amendment to be signed by their respective officers hereunto duly authorized,
all as of the date first written above.

                                       CONTINENTAL SOUTHERN RESOURCES, INC.

                                       By:__________________________________
                                          Name:
                                          Title:

                                       -------------------------------------
                                       [Holder]<PAGE>

                                                                   EXHIBIT 10.10

                                    AMENDMENT

                                     TO THE

                          LIMITED PARTNERSHIP AGREEMENT

                                       OF

                               PHT PARTNERS, L.P.

                              DATED AUGUST 14, 2002

                                 AUGUST 27, 2003

<PAGE>

                 AMENDMENT TO THE LIMITED PARTNERSHIP AGREEMENT
                                       OF
                               PHT PARTNERS, L.P.

         THIS AMENDMENT TO THE LIMITED PARTNERSHIP AGREEMENT is entered into
effective August 21, 2003, by and among PHT GAS, LLC (the "General Partner") and
those persons listed as Limited Partners on Exhibit A attached hereto.

         1.       Exhibit A to the Limited Partnership Agreement dated August
14, 2002 is amended to reflect additional paid-in capital by certain of the
Limited Partners.

         IN WITNESS WHEREOF, the General Partner and Limited Partners have
executed this Amendment the date and year above written.

GENERAL PARTNER:

PHT GAS, LLC

By: /s/ MARK A. BUSH
   -----------------------------------------
        Mark A. Bush, Managing Member

<PAGE>

                         PARTNERS AS OF AUGUST 27, 2003

<TABLE>
<CAPTION>
                                                                   CAPITAL                 PERCENTAGE
                                                                CONTRIBUTION                INTEREST
                                                                -------------              ----------
<S>                                                             <C>                        <C>
LIMITED PARTNERS:

BPK Resources, Inc.                                             $   76,493.00                  4.23%
5858 Westheimer Street, Suite 708
Houston, Texas  77057

Continental Southern Resources, Inc.                            $1,717,607.00                 94.77%
111 Presidential Boulevard
Suite 158-A
Bala Cynwyd, PA  19004

GENERAL PARTNER:

PHT Gas LLC                                                                                     1.0%
5858 Westheimer Street, Suite 708                               $   12,000.00
Houston, Texas  77057
</TABLE>

<PAGE>

                                    AMENDMENT

                                     TO THE

                          LIMITED PARTNERSHIP AGREEMENT

                                       OF

                               PHT PARTNERS, L.P.

                              DATED AUGUST 14, 2002

                                  JUNE 23, 2003

<PAGE>

                 AMENDMENT TO THE LIMITED PARTNERSHIP AGREEMENT
                                       OF
                               PHT PARTNERS, L.P.

         THIS AMENDMENT TO THE LIMITED PARTNERSHIP AGREEMENT is entered into
effective June 23, 2003, by and among PH GAS, LLC (the "General Partner") and
those persons listed as Limited Partners on Exhibit A attached hereto.

         1.       ARTICLE V. CONTRIBUTIONS TO CAPITAL AND STATUS OF PARTNERS
shall be amended at paragraph 5.1 (c) as follows:

         5.1      Capital Contributions and Loan Amounts.

                  (c)      Additional Capital Contributions. The Partners will
be required to make additional contributions to the capital of the Partnership
and may at the Limited Partners' discretion loan funds, from time to time, to
the Partnership.

         IN WITNESS WHEREOF, the General Partner and Limited Partners have
executed this Amendment the date and year above written.

GENERAL PARTNER:

PHT GAS, LLC

By: /s/ MARK A. BUSH
   -----------------------------------------
        Mark A. Bush, Managing Member

LIMITED PARTNERS:

CONTINENTAL SOUTHERN RESOURCES, INC.

By: /s/ STEPHEN P. HARRINGTON
   ---------------------------------
        Stephen P. Harrington, President

BPK RESOURCES, INC.

By: /s/ JOHN B. CONNALLY
   ---------------------------------
    John B. Connally, III, President

<PAGE>

                         PARTNERS AS OF AUGUST 27, 2003

<TABLE>
<CAPTION>
                                                                   CAPITAL                  PERCENTAGE
                                                                CONTRIBUTION                 INTEREST
                                                                -------------               ----------
<S>                                                             <C>                         <C>
LIMITED PARTNERS:

BPK Resources, Inc.                                             $   72,665.00                  4.23%
5858 Westheimer Street, Suite 708
Houston, Texas  77057

Continental Southern Resources, Inc.                            $1,629,890.00                 94.77%
111 Presidential Boulevard
Suite 158-A
Bala Cynwyd, PA  19004

GENERAL PARTNER:

PHT Gas LLC                                                                                     1.0%
5858 Westheimer Street, Suite 708                               $   12,000.00
Houston, Texas  77057
</TABLE>
<PAGE>

                                    AMENDMENT

                                     TO THE

                          LIMITED PARTNERSHIP AGREEMENT

                                       OF

                               PHT PARTNERS, L.P.

                              DATED AUGUST 27, 2003

                                February 26, 2004

<PAGE>

                 AMENDMENT TO THE LIMITED PARTNERSHIP AGREEMENT
                                       OF
                               PHT PARTNERS, L.P.

         THIS AMENDMENT TO THE LIMITED PARTNERSHIP AGREEMENT is entered into
effective February 26, 2004, by and among PHT Holding GP, LLC (the "General
Partner") and those persons listed as Limited Partners on Exhibit A attached
hereto.

         1. ARTICLE I. DEFINITIONS shall be amended to replace the definition of
General Partner and to add the definitions of Other Partners and Converted
General Partner as follows:

         "General Partner" means PHT Holding GP, LLC.

         "Other Partners" means PHT Holding GP, LLC and all Limited Partners
except PHT Gas, LLC.

         "Converted General Partner" means PHT Gas, LLC.

         2. ARTICLE VI. DISTRIBUTIONS; ALLOCATION OF PROFITS AND LOSSES; CAPITAL
ACCOUNTS shall be amended at 6.1(a)(i) and (ii) and 6.2(a)(iii) as follows:

         6.1      Cash Available for Distribution.

                  (a)      Distribution Prior to Liquidation.

         (i)      First , 99 percent to the Other Partners in proportion to and
                  to the extent of their Unreturned Capital Balances and one
                  percent to the Converted Partner until all Unreturned Capital
                  Balances have been reduced to zero;

         (ii)     Then, 80 percent to the Other Partners in proportion to their
                  Percentage Interests and 20 percent to the Converted General
                  Partner.

         6.2      Allocation of Profits and Losses.

                  (a)      Allocation of Profits.

                  (iii)    Then, 75 percent to the Other Partners in proportion
                           to their Percentage Interests and 25 percent to the
                           Converted General Partner.

         3. Exhibit A to the Limited Partnership Agreement dated February 26,
2004 is amended to reflect admission of PHT Holding GP, LLC and change in status
of PHT Gas, LLC from general partner to limited partner.

                            [SIGNATURE PAGE FOLLOWS]

                                       1

<PAGE>

         IN WITNESS WHEREOF, the General Partner and Limited Partners have
executed this Amendment the date and year above written.

                                GENERAL PARTNER:

                                PHT HOLDING GP, LLC

                                By:  /s/ STEPHEN P. HARRINGTON
                                     ------------------------------------------
                                     Stephen P. Harrington, Manager

                                LIMITED PARTNERS:

                                CONTINENTAL SOUTHERN RESOURCES, INC.

                                By:  /s/ STEPHEN P. HARRINGTON
                                     ------------------------------------------
                                     Stephen P. Harrington, President

                                PHT GAS, LLC

                                By:  /s/ MARK A. BUSH
                                     ------------------------------------------
                                     Mark A. Bush, Managing Member

                                BPK RESOURCES, INC.

                                By:
                                     ------------------------------------------
                                     John B. Connally, III, President

                                       2

<PAGE>

                        PARTNERS AS OF FEBRUARY 26, 2004

     --------------------------------------------------------------------------
                                             CAPITAL           PERCENTAGE
                                           CONTRIBUTION         INTEREST
     --------------------------------------------------------------------------
     LIMITED PARTNERS:
     --------------------------------------------------------------------------
     PHT Gas, LLC                          $   12,000.00          1.00%
     5858 Westheimer Street, Suite 708
     Houston, Texas 77057
     --------------------------------------------------------------------------
     BPK Resources, Inc.                   $   76,493.00          4.23%
     5858 Westheimer Street, Suite 708
     Houston, Texas 77057
     --------------------------------------------------------------------------
     Continental Southern Resources, Inc.  $1,717,607.00         93.77%
     111 Presidential Boulevard
     Suite 158-A
     Bala Cynwyd, PA  19004
     --------------------------------------------------------------------------
     GENERAL PARTNER:
     --------------------------------------------------------------------------
     PHT Holding GP, LLC                              --          1.00%
     111 Presidential Boulevard
     Suite 158-A
     Bala Cynwyd, PA  19004
     --------------------------------------------------------------------------

                                   Exhibit A                             Page 1

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