Hey DWBoxx I pulled mine out without removing the bumper cover. I posted a pic in the Muffler removal thread in the DIY section. Getting to any of the bolts on top of the muffler looks tough. I'm pretty sure this is a sure case of target fixation HAHA. Anyway look at my pic in that thread. I removed the 2 nuts that attach the long flat hanger to the top of the bracket on the back of the trans. Super easy. Pull them last and install first. I used a deep socket with I think a 1" extension. Broke the nuts free and spun off with an air ratchet. Easy even without an air ratchet. Getting the clamps loose on the mid pipes and u bends was the hardest part.
http://986forum.com/forums/diy-project-guides/22915-how-remove-muffler.html