I think it's pointless converting your mp3's back to normal CD's when there are alternatives to do what you want.You could always buy one of those CD walkman style mp3 players together with a tape adapter so you can play the device in the car , but only if your car player has a tape in it . You can buy a device that plugs into a walkman ,cassette player or whatever and will send the music to your car radio [its tunes in to a fm channel ]and lets you hear the sound through you car speakers , or do what I did and buy a car CD player , was only £59 and reads CD's as well as mp3 disks , but also has the SD card slot in the side and a USB port for plugging your mini mp3 player into .I now store all my music on the SD cards , I bought a load of 512mb ones especially for the job . The sound quality is really fantastic and they take up so much less space than a tape or CD.Hope this helps