Hopefully we can fully sort out the bios, for the moment the motherboard keychips must be correct and the newer titles (ZN2 etc) are out of reach at the moment.
ZN Bios board, thanks to @caius for spinning the schematics into a PCB.
Tecmo / Capcom2 are still uncracked but hopefully with the board things will be easier!
If you want to help on the cracking efforts let me know and i will get you a board made
In other news, seems the SC "key" for the Dev bios(s) is:
FC 38 FA F2 F1 E1 60 80