Was this...
http://empegbbs.com/ubbthreads/showflat....true#Post138376... ever implemented? I have several large playlists where it would be really nice to have. For example, Pixies' "U-Mass" came on yesterday. "My goodness, what a fine album Trompe Le Monde was", I thought. I have used Hijack so that I can do the tweak playlist thing in the car, but to hear all occurrences of "TLM" remaining in that playlist I need to repeat the process many times which is a bit hazardous when driving.
It would be nice if (for example) you could just hold the button down after going to Tweak Order -> Source and the empeg queued up all the rest of the tracks remaining in the playlist where source = "TLM" (and likewise if you fancied hearing a whole load of tracks from a particular artist, as opposed to a particular source). Unshuffling around the track (as per the FAQ) won't work, as that isn't how they are ordered.