yes it does. and now i will give mine:
select a normal brush. hit n. this brings up the enitity window with worldspawn selected.
for playing the track you selected:
note that for music and models you start typing the path at base folder, instead of doing this:
value: C:/Games/Star Wars Jedi Knight II: Jedi Outcast/GameData/base/music/artus_topside/impbased_action.mp3
Quall your example is kind of wrong. ALWAYS put the underscore in.