I am struggling even with the tutorial on modifying my bios for Asus Z9PR-D12 to enable pcie nvme booting. Does anyone have a modified bios available?

Edit by Fernando: Thread title specified

Use MMtool method, insert Standard DXE module.
A server motherboard, a bios mod, a bios mod flash operation, an unskilled user..., an easy mod guide that cant be followed, not a good combination.
Do it at ur own risk ONLY and dont ask how to flash or if its a ZERO FAIL tolerance mod.

[Guide] How to flash a modded AMI UEFI BIOS

I have tried using mmtool to apply the nvme modules according to the tutorial, when I go to install the bios, I’ll either get a security error or a size mismatch error. This is where I’m stuck.

I’ve been able to get this to work with other motherboards, so it’s not a matter of being an unskilled user, it’s just this motherboard in particular is giving me a migraine.

Then surely u know thats a problem in Asus security features that its preventing flashing a bios file that was modified.
But that u already know, im sure that uve read all the useful guides around here regarding flashing bios mod files and ways around it.