Here’s an Applescript I wrote. Basically, select a playlist in the left menu (e.g., My Top Rated) run this script and it will create a playlist folder with a playlist for every album (and every track in that album) for each album in the playlist. Make sense!?
I wrote it because the way I keep track (so to speak) of tunes I like is by rating them as 4 or 5 stars – which makes them appear in the My Top Rated smart playlist. But I also hate having incomplete albums on my iPod, so this is a simple way of syncing your My Top Rated, and all tracks of the albums in it.
Probably needs iTunes 8 or greater (or whenever playlist folders were introduced) and if it destroys something, it’s not my fault! It will also delete an existing playlist folder, so you can regenerate the folders as required.