Elisabeth,
Dont worry! Your creative ZEN will hook up to the stereo through the Aux. Jack (Next to the 12V power source [AKA: Cigarette Outlet] on the center console - As it seems you have a "Sport" model) You will just need a mini-plug to mini-plug adapter (looks like a headphone jack on both ends) and select "AUX" on the car's radio. You will be able to listen to your music just fine, but you will have to change folders/songs ON THE ACTUAL CREATIVE ZEN UNIT.
The IPODs are the only MP3's that offer complete control and allow you to change folders/songs ON THE IN-DASH RADIO.
Convenient to have an IPOD, but not the only MP3 player that can play through the stock stereo.
Thanks, Richard, for the miniplug info! That's so easy!
I'm heading out to buy a cable today! Ah, so nice to know that my MP3 player will work after all.