CD Music files to DVD

I use Nero 6 Ultra Edition. Is it possible to burn music files (cda?) to DVDs? This of course would greatly increase capacity.

Is it possible to burn just the 5.1 audio track from music DVDs using Nero? My car has 5.1 sound and I’d like to be able to play music DVDs without the video.

If Nero can’t do this, is there other software out there that does this?

Thanks for your help…