<DOCUMENT>
<TYPE>EX-3.43
<SEQUENCE>42
<FILENAME>p68936exv3w43.txt
<DESCRIPTION>EXHIBIT 3.43
<TEXT>
<PAGE>

                                                                    EXHIBIT 3.43

                            ARTICLES OF INCORPORATION

                                       OF

                              SIXTEEN PAC COMPANY

         KNOW ALL MEN BY THESE PRESENTS: That I, the undersigned, for the
purpose of forming a corporation under the laws of the State of Nevada, do
certify:

                                    ARTICLE I

         The name of the corporation is: SIXTEEN PAC COMPANY.

                                   ARTICLE II

         The principal place of business of the corporation shall be 1325
Airmotive Way, Suite 100, Reno, NV 89502.

                                   ARTICLE III

         The corporation's resident agent shall be: The Corporation Trust
Company of Nevada, 6100 Neil Road, Suite 500, Reno, Nevada 89511.

                                   ARTICLE IV

         The nature of the business and the objects and purposes to be
transacted, promoted, or carried on by the corporation are to engage in any
lawful act or activity for which corporations may be organized under the General
Corporation Law of Nevada.

<PAGE>

                                    ARTICLE V

         The corporation shall have authority to issue the following:

                The number of shares of commons stock which this corporation is
                authorized to issue is One Hundred Thousand (100,000) shares
                with a par value of One Cent ($.01) per share.

                                   ARTICLE VI

         The Board of Directors shall consist of one (1) to nine (9)
individuals, as determined by resolution of the Board of Directors. The initial
Board of Directors shall consist of one person, who shall serve as Director
until the annual meeting of shareholders or until his successor is elected and
qualified. Such person shall be Charles J. Bayer, 2721 N. Central Avenue,
Phoenix, AZ 85004.

                                   ARTICLE VII

         The name and address of the incorporator is:

                       Nancy K. Ventre
                       2721 N. Central Avenue, 11th Floor
                       Phoenix, Arizona 85003

                                  ARTICLE VIII

         The period of existence of the Corporation shall be perpetual.

                                   ARTICLE IX

         The corporation shall indemnify, to the fullest extent authorized or
permitted by law, as the same exists or may hereafter be amended, any person
made, or threatened to be made, a defendant or witness to any threatened,
pending or completed action, suit, or proceeding (whether civil, criminal,
administrative, investigative or otherwise) by reason of the fact that he or
she, or his or her testator or intestate, is or was a director or officer

                                       2
<PAGE>

of the corporation or by reason of the fact that such director or officer, at
the request of the corporation, is or was serving any other corporation,
partnership, joint venture, trust, employee benefit plan, or other enterprise.
Nothing contained herein shall diminish any rights to indemnification to which
employees or agents other than directors or officers may be entitled by law, and
the corporation may indemnify such employees and agents to the fullest extent
and in the manner permitted by law. The rights to indemnification set forth in
this Article shall not be exclusive of any other rights to which any person may
be entitled under any statute, provision of the Articles of Incorporation,
Bylaw, agreement, contract, vote of shareholders or directors, or as otherwise
provided.

         In furtherance and not in limitation of the powers conferred by
statute:

         1. The corporation may purchase and maintain insurance on behalf of any
person who is or was a director, officer, employee or agent of the corporation,
or is serving in any capacity, at the request of the corporation, any other
corporation, partnership, joint venture, trust, employee benefit plan or other
enterprise, against any liability or expense incurred by him or her in any such
capacity, or arising out of his or her status as such, whether or not the
corporation would have the power to indemnify him or her against such liability
or expense under the provisions of law; and

         2. The corporation may create a trust fund, grant a security interest
or lien on any assets of the corporation and/or use other means (including,
without limitation, letters of credit, guaranties, surety bonds and/or other
similar arrangements), and enter into contracts providing indemnification to the
full extent authorized or permitted by law and including as part thereof
provisions with respect to any or all of the foregoing to

                                       3
<PAGE>

ensure the payment of such amounts as may become necessary to effect
indemnification as provided therein, or elsewhere.

         No director or officer shall be personally liable to the corporation or
its stockholders for damages for breach of fiduciary duty as a director or
officer, except the liability of a director or officer shall not be limited or
eliminated for: (a) acts or omissions which involve intentional misconduct,
fraud or a knowing violation of law; or (b) the payment of distribution in
violation of Nevada Revised Statutes Section 78.300.

         IN WITNESS WHEREOF, I, the aforementioned incorporator, have signed the
Articles of Incorporation this 1 day of August, 2000.

                                              /s/ Nancy K. Ventre
                                              ----------------------------------
                                               Nancy K. Ventre, Incorporator

STATE OF ARIZONA        )
                        )
COUNTY OF MARICOPA      )

         I, NANCY JO BEILEY the undersigned authority, a Notary Public in and
for said County in said State, hereby certify that on the 1st day of August,
2000 before me personally appeared, Nancy K. Ventre who is the person named in
and who executed the foregoing Articles of Incorporation and who is known to me,
executed the same as Incorporator and with full authority, executed the same
voluntarily for and as the act of said corporation.

         IN TESTIMONY WHEREOF, I have hereunto set my hand and affixed my
official seal this 1st day of August, 2000.

                                               /s/ Nancy Jo Beiley
                                               -----------------------
                                               NOTARY PUBLIC
                                               My Commission Expires: 5-22-2003

                                       4

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