[REQUEST] Modding my HP P78 bios to allow OC and undervolt, please

BIOS/UEFI Modding BIOS Modding Requests
1

I would like to mod my bios from P78 Family which has the update 01.48 Rev.A for hp-elitebook-840-g4-notebook-pc

I was using GRUB but the guide was for HP Pavillon and I could not be offered to take the risk calculating the wrong firmware values etc.

HP P78 Bios .bin

Thx!