You plug the PIE-aux connector into the back of the stock head unit in the CD changer slot. That will give you a set of RCA plugs for an aux input, you can use a satelitte radio, MP3 player, Minidisc, anything....

As far as where to get the PIE-aux, a search on Yahoo or Google wil turn up a lot of places that sell it, but here's one to start you off on:
http://www.logjamelectronics.com/auxinpconv.html

 

[QUOTE]Originally posted by Luft46
You plug the PIE-aux connector into the back of the stock head unit in the CD changer slot.