It already does that. Or seems to. That doesn't help the fact that I end up with a Playlist tree that looks like:
U2

  War

    War

  Joshua Tree

    Joshua Tree

The Who

  The Who Sell Out

    The Who Sell Out

  Meaty, Beaty, Big and Bouncy

    Meaty, Beaty, Big and Bouncy
_________________________
Bitt Faulk