I completely understand what you're talking about Tony, but I have instances where I have duplicates that are not from any particular source on the player that I occasionally want to replace with a tune from a specific source on the player. Often this happens when I've uploaded some new CD's only to find that I had some of the tracks from those same CD's already on the player in various playlists. At that point, I would want to replace them with the tracks from the actual CD and not leave them on the player independantly.