i have a MACH 460 on my 01 Gt, and i recently instaled an Aux on it with 2 inputs, it workd great with great sound quality and you can use your CD changer (they claim that you can't but you can!)
here is the part
http://www.crutchfield.com/S-ERTZEgs...i=581DFF20#Tab
And here is the setup that i copied, pretty nice looking
Studio711.com
:yes me too... (since my 6cd changer crapped out on me), works decentlyi bought that wireless transmitter that plugs in to the ipod and use the radio frequency to listen to it while i drive!