Breath of Fire 2 SPC hacking

Okay, massive bump (sorry). I guess what I was asking was, during the halfway point in the game, an NPC or plotscript seems to trigger the alternate battle theme. It's right after the NPC mentions getting magic flute to communicate with the town's music residents. Now, after doing some thinking and research on the whole aspect of hacking, I don't want to change the sequences and/or order of the songs per se.

What I am looking for is the actual switch (plotscript that the NPC activates) in the ROM itself, it might be somewhere from 00BD75C and on, I don't know. Although somewhat unrelated, the program RPG Maker VX has a script command that, upon speaking to an assigned NPC, you can tell the game to "Load BGM: battle.mp3/midi" and the effect takes place immediately. Surely, a similar action occurs after speaking to this NPC in Tuneland.

I'm not trying to sound unreasonable, but I'm 100% convinced that there is a connection between this NPC's activated plotscript and the moment the battle theme changes. Perhaps I can start a new game, get to where the NPC is located and see exactly when the change occurs. If I'm wrong, so be it. I just thought I'd throw that out there.