if I'm not mistaken,a Texas Bullrope match involves a lentghy piece of rope with a cowbell(<<insert Christopher Walken joke here:haha tied into the middle of it,and than each wrestler has one of their wrists tied into the opposing ends of the rope.
So basically you use the rope and or cowbell to give a "Texas sized beating" to your opponet.
Dusty Rhodes made this match "infamous" back in the early 80's,which is porbably why the WWE is giving him the match at the GAB...event hough he will probably lose to Orton in it.