Best idea for Navi disc solution - you buy a used XM box off of ebay for less than $40, the iPod direct cable for less than $25, and a used 30g iPod for dirt cheap. Next, load up the iPod with as much songs/videos/movies as you can find and throw it in your glove box plugged into the cable. Get your XM box hooked up. Then put the Navi disc in and you'll be set. I can't remember when I put a cd in last, LOL!
Couple of things to remember with this setup:
- Don't forget to swap the yellow wire and ground it so you can watch videos while driving.
- Buy the OEM pioneer cable so all of the functions work with the iPod (BTW, it's the most superior cable I've seen so far.)
- Don't buy the newest iPod series (Touch, Nano, etc), because the cable wll not allow you to watch videos/movies.