There's a little red pin on the resource manager. That stops it (mostly, still kinda buggy).

1. DO NOT MAKE IT GLOBAL.

2. Playlist is music resource, Ambient is a seprate entry for ambient sounds like chirping birds and such. Those are listed as AMB_VOL IIRC.

3. Yeah, you'll need the polygon (or switch to a box for a quick and dirty approach).

4. I haven't tested this fully, by it seems to keep playing the current track even if you leave the poly. If you are outside the poly, it will stop once the track is finished. If you are inside the poly the next track of that playlist will play.

5. No.

Also don't forget that for playlists, only the ones with the "new" label seem to work.