Yeah you can get an adapter that converts the changer plug into an RCA input. Then you just need one of those little miniplug-to-RCA adapters that you can find at any Radio Shack.

For example:

http://www.autotoys.com/x/catalog/HO...003_p_199.html
http://www.installer.com/acc/honaux.html

The thing is, you can get an entire headunit with an Aux input for not much more.

http://www.crutchfield.com/S-ArxzPro...=1&cc=01&avf=Y
http://www.crutchfield.com/S-ArxzPro...=1&cc=01&avf=Y


Etcetera etcetera.