Not sure if anyone has tried this. I have no experience creating user tracks so don't even know if its possible. Could you take a cover song multi track file and create a user track from that in the style of that song to use in band in box.

The multi tracks are wave files so I would assume that if you created the original song template in BIAB and assuming the multi track file is timed correctly you could record this as a user track.

If possible users could create not only user tracks but user style sets. That would be cool.