[REQUEST] Lenovo B51-80 Unlock Bios

Hey,

I want to unlock all hidden options for this laptop, mainly to be able to change the HD520 default DVMT prealloc (can't change it using EFI shell via setup_var)
If it helps, the variable that needs changing is 0x180 to 0x20.

The bios ROM backup can be found here:
https://www.dropbox.com/s/pv6hsjtv7mg6l2...9.rom?dl=0

Please let me know if anything else is needed.

Thank you.