[Zubersoft]

No, nested groups are not supported. I may allow a group of setlists in the future, but it would be limited to a depth of 1 (i.e. you can't have setlists include other setlists, this would be just a single list of setlists). I do not want to allow nested groups because that requires supporting an infinite depth. It would greatly complicate the UI for, in my opinion, little benefit.  It would also cause the database tables to become a nightmare and this could have significant negative consequences for users with large libraries. 

Mike