For any of you here with stock decks that are using an FM transmitter to play your MP3 player, google GM9-AUX. I bought one of these little boxes while I was TDY in the states last month. It plugs into the cd changer port on the back of the stock deck, and you use the RCA cables with the headphone jack on the end. It took about 10 minutes to install, and it sounds great. Let me know if I am a day late and dollar short with this post, but I thought it might help. Here's a link:
http://www.discountcarstereo.com/detail.aspx?ID=347