i'm just trying to figure out a cheap and effective way to get more songs in my car. right now i just have an mp3 player playing burned CD-Rs. i'm not sure what the best route is though. should i get a cd changer and then just have multiple cd's or is there some way i can get a unit to play mp3's off of DVD-Rs. life would be great if i could start burnin songs to 4.5gb than 700mb. any suggestions? thanks.