This loads the game, but the sound is all messed up.Not sure if I'm missing something.
Just double checked.The rom works on MAME, but in FBNeo the intro sounds weird, menus have no SFX, characters are mute, there's no BGM and after a while, even footsteps and hits become mute too.
I think I know what you're trying to say, some of the added characters in this hack game use the z80 cpu and sound samples from other versions of kof, and the current fbneo doesn't have an emulation of the extra z80 cpu, so the voices of these added characters are incomplete, and this has nothing to do with the romdata functionality, so please be aware of that.