I heard somewhere that there is a way to change the music in the game or something like that? I don't mean to turn down the in-game music and play my own, I mean for example whenever you go to the Vanaduke boss stage or something it plays different music, or something that you choose (That's only an example)

I don't know if this is true, or if there is a way to do it. But, if there is would someone mind explaining it to me?

Thanks,
~Dark