I tried to find cushman's email, but on his site it said to discuss Palantir issues here...
1) I wondered how I can create a playlist that contains only, say, a soundtrack (with a number of different artists) and beam it to the empeg? I can only search artists, but that won't help me find the soundtrack (most often I don't even know any artist on the soundtrack).
2) Is there a way to run Palantir from an expansion card to save precious RAM?

can't you do it a la ipod and just add an ALL entry for the artists, so the "Track By Album" screen will contain all of the albums, allowing you to select all songs in a various artists tracklist?

No. To make it fast, the concept is this: All tracks are listed one after another in the database in sort order Artist - Year - Album - Tracknr - Title. This way when displaying an album, all I have to do is seek to the first song in that album and read out x tracks until I hit the next album. It doesn't work like a relational database where you can use a query to return records. This was developed on a Palm Vx, so speed was one of my concerns, and a database with 10,000 tracks would have been slow, especially when scrolling in one of the views.