if you want to do it quick get Nero Burning rom 5.5.9.14 use this serial OI read the forumrules!!!!
when you open it up usually there is a window that pops up asking you what you want to do select the things you want than click next. do this once more untill it asks you what type of cd you want to burn select audio than click next and finish and when you burn the CD it will be able to play in your car. downside you'll need alot of cds since you can only fit 15-20 songs on each CD since they are wav. the quality might not be as good but you won't see that much of a difference