SPECIAL POWER OF ATTORNEY




KNOWN ALL MEN BY THESE PRESENTS, that I, Gregory S. Humenesky,
hereby constitute and appoint J. Rodney Lawrence, my true and
lawful attorney-in-fact and agent, with full power of substitution
and resubstitution, for me and in my name, place and stead, in any
and all capacities, to sign any or all SEC Forms 4 and 5, granting
unto said attorney-in-fact and agent full power and authority to do
and perform each and every act and thing requisite and necessary to
be done in and about the premises, as fully to all intents and
purposes as I might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent, or his
substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 2nd day of
March, 2005.


/s/ Gregory S. Humenesky
   				Gregory S. Humenesky



STATE OF TEXAS

COUNTY OF TARRANT


Before me, the undersigned authority, on this day personally
appeared Gregory S. Humenesky, known to me to be the person whose
name is subscribed to the foregoing instrument and acknowledged to
me that he executed the same for the purposes and consideration
therein expressed.

Given under my hand and seal of office this 2nd day of March,
2005.



(seal)					/s/ Deanna L. Neal
				Notary Public in and for the State
of Texas
My commission expires: 5-23-06



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