how to sort by description field?

This is a great module - I'm using it to provide playlist functionality on an existing music database. What's killing me is that I can't figure out how to make it sort by the description field. I use description for playlist track #, so it would be great if I could sort that ascending.

Even in the code, I'm having a hard time figuring out what to modify. I tried adding sort($data) at about line 500 of multireference.module , but alas it was not that simple. Any suggestions?

Thanks in advance!