Why, that's exactly what I need: a new 'contains' tag that searches for playlists containing particular FID. The result is a list of playlists in RHS window. From UI viewpoint easy and obvious; I don't know about internals, though...

Any point in repeating this in wishlist section?

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green