mp3 format? I have downloaded Audacity, which I dont understand how it works,and have tried burning with windows media player 9. All the discs come out as wma. I have borrowed mp3 discs but, because they contain art and covers, the car stereo will not read them. Do I need a specialist programme or can I Set windows media player to only burn in mp3 mode? Ive wasted loads of discs trying, Help please!!