The song rating, if I recall correctly, is using the "Times Skipped" value as the rating.

Reason: The empeg guys implemented a field for Times Skipped but ended up never using it. So it was easy for Emphatic to modify that field and do something with it.

So in Emplode or Jemplode, if there is a way to search on that field (not sure if there is or not), that's the one to look for.

Again, this is all IIRC, so someone correct me if I'm wrong.