ga-b75m-d3v rev. 2 BIOS unlocked with NVMe Support

I have the GA-B75M-D3V motherboard with the latest bios, FD, 04/17/2014.
I want to exploit it and I would like to test it with a pci express adapter to boot the operating system from there.
Can anyone help me here?

U can follow the procedure here: [HowTo] Get full NVMe support for all Systems with an AMI UEFI BIOS

Method MMTool (Small DXE variant), but first due to space in volume bios u need to update (get reduced) processor mcodes with UBU
[Tool Guide+News] “UEFI BIOS Updater” (UBU) (4)

Flash guidance here, but u should have no problem with M-Flash: [Guide] How to flash a modded AMI UEFI BIOS

No more unlocks/mod bios needed for NVMe, else the use of the tool AMIBCP at ur own risk for deeper mods.
Boot/Install OS procedures, again on the first link.

I will study it but it seems difficult. I will probably break the motherboard.