unanswered How to change Music/OST in Pokemon HGSS

[ZephyrosDS]

Ey' Project Pokemon. I've got a bit of a question. How do I change the Music/OST of Pokemon HGSS? I've figured out how to hack most of the game and while that is a monumental achievement it in itself, I can't figure out how to change the music found in Pokemon HGSS. I just need someone to point me in a general direction because a simple Google or Forum search does not yield any results. Whether it be a general pointer or an explanation I'd be grateful either way!

Thanks!