I have attempted to email the program that I have created to some people. Was having some trouble so I decided to share it here:
I have password encrypted the zip file so that certain virus programs don't block it. But I'm not sure if that is really making a difference.
Let me know if this works for you and any comments you might have. I can be used to convert files both ways from Backup format to MP3/WMA and also allows you to create a Backup that can be used to restore to BMW.
It was thrown together fairly quickly, so there are bound to be some bugs. Just let me know what they are and I'll update it.