NullthraB wrote...
The MORE important question is, will players who download my module be able to hear the gui_quest_done sound?.
Yes at least if this is default NWN resource and not custom content sound. Music/sounds is client-side it depends on what player have. If you do not this sound in hak associated with the module, client-version will be used.
Anyway I dont understand what you have been trying to do and what you have done. But if you put something into your override, simply delete it from override and default version will be used, if you altered files in music folder and canot get them back, try reinstalling the game.