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exv10w1

 

EXHIBIT 10.1

AMENDMENT NO. 4 TO TEKELEC

2004 EQUITY INCENTIVE PLAN FOR NEW EMPLOYEES

     Section 3 of the Tekelec 2004 Equity Incentive Plan for New Employees is hereby amended,
effective August 1, 2005, to read in its entirety as follows:

	 	“3.	 	Shares Reserved.

     The maximum aggregate number of Shares reserved for issuance
pursuant to the Plan shall be 6,000,000 Shares or the number of shares
of stock to which such Shares shall be adjusted as provided
in Section 11 of the Plan. Such number of Shares may be set aside
out of authorized but unissued Shares not reserved for any other
purpose, or out of issued Shares acquired for and held in the
treasury of the Company from time to time.

     Shares subject to, but not sold or issued under, any Award
terminating, expiring, forfeited or canceled for any reason prior to
the issuance of such Shares shall again become available for Awards
thereafter granted under the Plan and the same shall not be deemed
an increase in the number of Shares reserved for issuance under the
Plan.”

* * *<PAGE>
                                                                     Exhibit 4.2

                          FIRST SUPPLEMENTAL INDENTURE

          FIRST SUPPLEMENTAL INDENTURE dated as of July 28, 2005 among PETROHAWK
ENERGY CORPORATION, a Delaware corporation (the "Company") and the successor by
way of merger to Mission Resources Corporation, a Delaware corporation
("Mission"), the parties listed on the signature page hereof as Existing
Subsidiary Guarantors (each, an "Existing Subsidiary Guarantor"), the parties
listed on the signature page hereof as Additional Subsidiary Guarantors (each,
an "Additional Subsidiary Guarantor"), and THE BANK OF NEW YORK TRUST COMPANY,
N.A., a national association (the "Trustee"), as successor trustee to The Bank
of New York, to the Indenture dated as of April 8, 2004 (the "Indenture",
capitalized terms used herein and not otherwise defined having the respective
meanings specified in the Indenture) among Mission, the Subsidiary Guarantors
named therein and the Trustee.

                                    RECITALS

          A. Mission has merged (the "Merger") with and into the Company on the
date hereof, and the Company is the survivor of the Merger.

          B. The Company is entering into this First Supplemental Indenture
pursuant Section 8.1(A)(1)(b) of the Indenture in order expressly to assume all
the obligations of Mission under the Notes and the Indenture.

          C. Each Existing Subsidiary Guarantor is entering into this First
Supplemental Indenture pursuant to Section 8.1(A)(6) of the Indenture to confirm
that its Subsidiary Guarantee of the Notes will apply to the Company's
obligations under the Indenture and the Notes.

          D. Each Additional Subsidiary Guarantor is entering into this First
Supplemental Indenture pursuant to Section 10.12 of the Indenture to evidence
its agreement to be an additional Subsidiary Guarantor under the Indenture.

          E. The entering into of this First Supplemental Indenture without the
consent of any Holder is permitted under Sections 9.1(a) and 9.1(g) of the
Indenture.

          NOW, THEREFORE, THIS FIRST SUPPLEMENTAL INDENTURE WITNESSETH:

          1. The Company expressly assumes all the obligations of Mission under
the Notes and the Indenture.

<PAGE>

                                        2

          2. Each Existing Subsidiary Guarantor confirms that its Subsidiary
Guarantee of the Notes will apply to the Company's obligations under the
Indenture and the Notes.

          3. Each Additional Subsidiary Guarantor:

          (a) (i) accepts and assumes all obligations of, and agrees that it is,
     an additional Subsidiary Guarantor under the Indenture and (ii)
     unconditionally, jointly and severally, enters into and makes the
     Subsidiary Guarantee as provided in Article 13 of the Indenture; provided
     that, as provided in Section 10.12(b) of the Indenture, the obligations of
     each Additional Subsidiary Guarantor under the Indenture will be
     automatically and unconditionally released and discharged upon the terms
     and conditions set forth in Section 13.3 of the Indenture;

          (b) waives and agrees not to claim or take the benefit or advantage
     of, in any manner whatsoever, any rights of reimbursement, indemnity or
     subrogation or any other rights against the Company or any other Restricted
     Subsidiary as a result of any payment by such Restricted Subsidiary under
     its Subsidiary Guarantee until such time as the obligations guaranteed
     thereby are paid in full; and

          (c) represents that it is a Restricted Subsidiary of the Company under
     the Indenture.

          4. Sections 1, 2 and 3 of this First Supplemental Indenture shall
become effective immediately upon the satisfaction of the conditions to the
Merger set forth in Section 8.1 of the Indenture and the satisfaction of the
requirements of Section 9.3 of the Indenture with respect to this First
Supplemental Indenture.

          5. Upon the effectiveness of Sections 1, 2 and 3 hereof, on and after
the date hereof each reference in the Indenture to "this Indenture",
"hereunder", "hereof" or words of like import referring to the Indenture, and
each reference in the Notes or the Subsidiary Guarantees to the "Indenture",
"thereunder", "thereof" or words of like import referring to the Indenture,
shall mean and be a reference to the Indenture as supplemented hereby and each
reference in the Notes to "this Note", "hereunder", "hereof" or words of like
import referring to the Notes shall mean and be a reference to the Notes as
supplemented hereby and each reference in the Subsidiary Guarantees to "the
Notes", "thereunder", "thereof" or words of like import referring to the Notes
shall mean and be a reference to the Notes as supplemented hereby. Each
reference in the Indenture, the Notes, or related documents to Subsidiary
Guarantor shall mean and be a reference to the Existing Subsidiary Guarantors
and to the Additional Subsidiary Guarantors.

<PAGE>

                                        3

          6. Except as specifically supplemented above, the Indenture, the Notes
and the Subsidiary Guarantees are and shall continue to be in full force and
effect and are hereby in all respects ratified and confirmed.

          7. This First Supplemental Indenture may be executed in any number of
counterparts and by different parties hereto in separate counterparts, each of
which when so executed and delivered shall be deemed to be an original and all
of which taken together shall constitute but one and the same agreement. Deliver
of an executed signature page hereof by facsimile transmission shall be
effective as delivery of an original executed signature page hereof.

          8. This First Supplemental Indenture shall be governed by, and
construed in accordance with, the law of the State of New York.

<PAGE>

                                        4

          IN WITNESS WHEREOF, the parties hereto have caused this First
Supplemental Indenture to be executed by their respective officers thereunto
duly authorized, as of the date first-above written.

PETROHAWK ENERGY CORPORATION               THE BANK OF NEW YORK TRUST COMPANY,
                                           N.A., as successor trustee to
                                           The Bank of New York

By                                         By
   -------------------------------------      ----------------------------------
   Floyd C. Wilson                            Patrick T. Giordano
   President and Chief Executive Officer      Vice President

EXISTING SUBSIDIARY GUARANTORS:

BLACK HAWK OIL COMPANY                     MISSION E&P LIMITED PARTNERSHIP
                                           By: BLACK HAWK OIL COMPANY
                                               Its General Partner

By                                         By
   -------------------------------------      ----------------------------------
   Floyd C. Wilson                            Floyd C. Wilson
   President and Chief Executive Officer      President and Chief Executive
                                              Officer

<PAGE>

MISSION HOLDINGS LLC

By
   -------------------------------------
   Connie D. Tatum
   President

<PAGE>

ADDITIONAL SUBSIDIARY GUARANTORS:

BETA OPERATING COMPANY, L.L.C.             P-H ENERGY, LLC
By: PETROHAWK ENERGY
    CORPORATION
       Its Sole Member

By                                         By
   -------------------------------------      ----------------------------------
   Floyd C. Wilson                            Floyd C. Wilson
   President and Chief Executive Officer      President and Chief Executive
                                              Officer

PROHAWK OIL & GAS CORPORATION              PETROHAWK OPERATING COMPANY

By                                         By
   -------------------------------------      ----------------------------------
   Floyd C. Wilson                            Floyd C. Wilson
   President and Chief Executive Officer      President and Chief Executive
                                              Officer

RED RIVER FIELD SERVICES, L.L.C.           TCM, L.L.C.
By: BETA OPERATING COMPANY, L.L.C.         By: BETA OPERATING COMPANY, L.L.C.
       Its Sole Member                            Its Sole Member

By: PETROHAWK ENERGY CORPORATION           By: PETROHAWK ENERGY CORPORATION
       Its Sole Member                            Its Sole Member

By                                         By
   -------------------------------------      ----------------------------------
   Floyd C. Wilson                            Floyd C. Wilson
   President and Chief Executive Officer      President and Chief Executive
                                              Officer

PETROHAWK PROPERTIES, LP                   PROHAWK OPERATING, LLC
By: P-H Energy, LLC                        By: PROHAWK OIL & GAS CORPORATION
    Its General Partner                           Its Sole Member-Manager

By                                         By
   -------------------------------------      ----------------------------------
   Floyd C. Wilson                            Floyd C. Wilson
   President and Chief Executive Officer      President and Chief Executive
                                              Officer

<PAGE>

PETROHAWK HOLDINGS, LLC

By
   -------------------------------------
   Connie D. Tatum
   President

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