There is and Aux adapter for sale on ebay (
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5855821645)
I did not think of posting it here first....sorry!
This will allow you to connect DVD sound, iPods, MP3 players, satellite radio receivers, carputers, or any other audio device with a stereo RCA or 1/8" stereo line outputs. It can be used on the factory Bose or non-Bose head unit of 2002-Early 2003 Nissan Altima or 2002 Nissan Xterra, and some early 2003 models.