Give these guys a call to get a receiver and antenna.
http://www.infinitipartsusa.com/ Service and prices are unmatched. There is not a bracket in the receiver kit (to attach the receiver to the fenderwell) so get two of those also (one for each side of the satellite receiver). They will also send you the factory instruction guide - or e-mail me if you need it - I'll send you the one I got from them. They can also tell you (by VIN) if your car is prewired. If it is, let me know and I'll tell you how to find the plugs - if not, you'll need to buy a wiring harness from them as well and get advice from someone else on how to install that harness (mine was pre-wired). The guy who posted his nav system and ipod in his 03 can give you good advice there.
Good luck.LG