most of the time unless you buy a cd changer from the dealer or a place like Technicar in oldsmar, you wont be able to use the aux plug because its different from a regular changer plug. the best bet would be to install an in dash cd player and not worry about a changer. if your really worried about screwing it up, get a radio from CC so they can sell u the harness for it and for the car so u wont hafta connect any wires, its just a plug-and-play harness. also, any regular size radio (called single din) will fit in there, its just a matter of whether or not you will need to use a dash kit to fill the extra space.

hope this helps
kevin