Stereo Question

I am not sure but I am using the XM Commander unit and it works great. It's small and I have it mounted in front of the shifter using velcro with the wire ran under the bezel for the shifter. The fm modulator is mounted under the rear deck right next to one of the mach 460 amps. The antenna is mounted outside the car on the driver's side near the C pillar. It is a strong magnet and just pops right on. Works great! Just tune radio to 87.1 and listen.

That's all I got for you. I have a 2001 so I am not sure if you can actually use the new ones as a display for the xm radio. If not, I would check out XM Commander for $160, it's pretty pimp sauce

Go to a Ford dealer and ask about installing Sirius radio on your mustang. I know my Mach1000 system has a SAT button for that option. Ford has a contract with Sirius, XM is with GM mainly.