has it got audio sockets on the rear of the cd player
if it has you may need a 3.5 jack socket to phono
plug the phono to the rear of the cd player and the 3.5 jack socket to the ear phone socket of your ipod and hey presto sound from ipod/cd in a fraction of the price of a new head unit
the lead is available from any good electronic shop
Well if your receiver doesn't have an auxiliary audio jack, then your best bet is to purchase an FM transmitter. The transmitter attaches to your iPod then broadcasts the music to an unused bandwidth station on your radio.