Ok, first of all, sorry for double posting, but here are some things:
Place the mp3s in audio/se, and malta10's mod in mods/data folder.
In the game, the whole script completely lose its focus when you lose your first rival battle, i wonder why this happens (or maybe it's a glitch).
You can decrease the bgm volume, i don't know how i've done it, the OCR is tricky in the options menu. I hope this helps.