You need to create it in audio format to be able to play it in your truck. Most (especially stock stereos) cd players in autos will only read an audio cd and can not read data cds. Another thing you could do is purchase an MP3 player and fm transmitter that will broadcast a signal to your car stereo. This is the way I listen to my audio files in my truck and it works perfectly. Here's a link to the transmitter I use with my Creative player:

Griffin iTrip Auto Universal FM Transmitter

This one also will charge your player as you use it. They also have ones for an iPod if thats the player that you choose as a purchase.

"everything will be ok in the end. if it's not ok, it's not the end" - unknown