Sound as Variable, Setting Playlists

Wow! Something new- I'm confused. G'ah.

I've figured out with little difficulty how to play music during a cutscene, albeit through rather primitive means (ie. have a footman walk on a region :bgrun: ), but I still don't know how to either set a variable equal to an actual sound file from my campaign (if it's supposed to be from the scenario's imported files, um, whoops) or from that point on set it to my scenario's playlist- having the music loop, rather than go once and be done with it. Bah, thanks in advance for the help.