At my school we have some classrooms with printers, so they are in their own smart group (based on room name) with a config profile set to that group. What I'd like to have is a Smart Group that would take all of my other classroom computers and place them into a group so that I can apply a generic config profile to them. But, for example, say a classroom get's a printer, I can make a new Smart Group for that room and they would get the new settings and leave the generic Smart Group.

I know I can make a Smart Group and specify specific groups that the machines are not part of, but that is a manual addition and I'd have to update that list every time I make a new Smart Group. I guess I'm looking for a Smart Group of machines that are not in any other Smart Group. Any ideas?