Bob- You're going to get hammered...there are LOTS of threads. That being said, I just installed the factory XM in my '06 but added an aftermarket antenna on the roof directly in front of the hatch. The installation of the antenna was really pretty easy. I used a razorblade and sliced a slit into the hatch molding and ran the wire through it. (Don't want the wire on metal when the door slams, so don't slice all the way through...also seal the gasket with silicone after you're done). From there I ran to the driver's side under the headliner and then up to the rear door along the ceiling. From there I ran down the pillar to the carpet and then all the way to the front along the carpet, taking off molding and trim as I ran. Took me 30 minutes start to finish and I did a darn good job. I also had to uninstall the factory antenna (which ran up the A pillar and onto the windshield) Good Luck!!