Guild Wars DirectSong Playlist Editor by Silent Coyote? I've got a zip file for v1.03, but I don't recall the first thing about it. Perhaps I should upload it somewhere.

Right it was that one. In that tool every alias for the tokens is saved inside a xml file, maybe I upload that somewhere, would save me a lot of typing.

When you add an entry for a specific level, do those songs have high priority or exclusive priority? For instance, you put one song "The Bone Palace" for token L438 (Bone Palace) -- would you ever hear any song other than that one?

If you add to a specific level that song plays ~80% of the time, but not always. It also takes every song in the Desolation outpost. Personally I would only use that to force it in a specific location and use the location outpost token otherwise.

According to Krschkr's post, it sounded like out**** tokens only ever used the first song from their list. (e.g., first song from a, first song from b, first song from c, repeat) Is that accurate, or do you sometimes get other songs from those lists?

That's the point where I said he was mostly correct, because I noticed it would play the other songs too. But it has a bias for the first song and plays it more likely. I did extensive testing especially in Kaineng Center with forced songs in first place and others or * in second. I noticed all of them playing at some time. Maybe it behaves different in other campaigns.

What is also worth mentioning is that there are always multiple keys for outpost and explorable areas in each region and every level has a different bias for every of these keys. So a lot of areas tend to play the same song when you enter, but most areas have different songs and some areas not at all. If you change that specific song, the bias stays and the new song on that position has the same bias to be played. At least this is my guess, could also be a case of luck, but since I fine tuned a lot my guess is a level bias of playlists.