Well I figured out how to change music for different maps, but I can't figure out how to change it for battle instances.  Any help?

EDIT:  I figured out how to change the battle theme for events...sorta.  Some maps, like Guardia Forest, just have a line at the top that points to the address of the battle theme to be used throughout the whole map.  Other maps, like the Heckran Cave, call the battle theme at multiple points throughout, so I have to search the whole damn event code for all instances of it.  And then there are some maps where I KNOW you fight and hear the battle theme but I can't find it in code.  Is there a more efficient way to do this?

You're probably going to have to learn some assembly and figure it out via the game code unless somebody who knows the information already comes along. I'd bet my lunch, one or two bytes written to one of the APU ports is all that is required to change songs. Most SNES games I've seen have a pretty simple, but effective,  protocol for music selection.

Why don't you do a little hex editing and replace the SPC pointer for Battle with the pointer for Battle 2 and change the instruments accordingly?

Any suggestions on which hex editor to use to change pointers?  I'm not sure how to do it

CT's got an instrument index data block that should make this easy.  Just swap the Battle -> Battle 2 SPC pointers and swap the instrument index table entries and viola.  Or I guess I could stop being lazy and release this: http://img.photobucket.com/albums/v307/VonBlitzKrieg/spc_editor-main.gif