Hey man, another ATL in the house. I just found this site recently myself.

As far as "which X do I have" - found this on nissanhelp.com:

".......2003 XE models feature black trim around the headlights and grille, with a silver roof rack, step rails, wheels and front lower fascia. SE models come with a dark titanium-colored finish on all exterior trim, accessories and wheels."

On the CD issue...sorry, no help here. I'm sure one of the mods or longtimers can help you out.