Hacking Daigassou Band Brothers DX and custom firmware

[azotyp]

So I have custom firmware (merged love) and won't change it to normal firmware because of that game (bliss firmware dont have rom backing up so it wont count). Please can anybody tell me what to do to launch that game. I heard about save made for it but info must be added to other files in firmware directory, to launch that game with that save, but I dont know how to do it.
help