Whats up guys

I have a 30 GB ipod..i wanna hook it up using a cable to connect to the back of my head unit. I have a 2000 S4 with the cd changer. I am looking to remove the cd changer and install the ipod in its place. I just don't know which cable I need to buy. Also, where can I get radio keys and does anybody have them near the Philadelphia area that wouldn't mind helping me out a bit??

Thanks in advance

-Mark

 

www.enfig.com