Ok, this may be a completely elementary question, but I still need help. I have been downloading and burning songs on cds for years. I always make cds with about 19 songs per cd (and i believe the songs are in wav/mp3 format). I recently got a new car head unit which states it will play cds with over 100 songs on it. So my question is, how do I burn 100 songs of my iTunes on to a cd which will then play in the car?