MegaGlests' game mods menu let's you install many new mods. Even more are available on the MegaGlest Wiki and the Mods forum.
Yea its for a Glest mod.Well.. Maybe about 20 minutes would provide enough variation for a game, afterall - It IS just background music, albeit special and storytelling - but not many people are really bothered whilst they hack there way through hordes of demons...