I don't know about Tony, but you've compleetly confused me. I suspect you might need to use the player a bit more to get the hang of it. Tweak Order isn't anything that needs to be configured, it just works(as long as your tags are right, but everyone has perfect tags, right?). Playlists within playlists are a basic feature the empeg has. The only way for me to select a nirvana song specificaly is to go into By Artist > Nirvana.

Care to elaborate a bit more on what exactly you're trying to do? How does it differ from the basic nested playlists? It could just be I'm missing your point entirely...

Matthew