[M55555]

Easiest way probably is purchasing iPod integration units like Dice and Intravee. If only you had a 09/2002+ you could just purchase a OEM Aux input and call it a day.

IIRC, you do not lose CD Changer capabilities.

 

[freakshoww]

With a 9/02+ build date, you wouldn't lose anything.
When you go the intravee route, you do lose your changer.

 

[RichardP]

When you go the intravee route, you do lose your changer.

Unless you also add an AI-Net switch (KCA-400c or KCA-410c) in which case you can also use an Alpine AI-Net CD Changer, but it gets expensive.