Asus Z9pe-D16 NVMe bios modding

Hello, I am from Thailand,this is my first time to post and sorry If I can not use specific word to describe it, I need your help to solve my flash problem with Z9pe-D16.
I read this guide to do step by step and I was struck when I try to flash bios with EZ utility,there was a message “security verification failed” I think written protection is not allowed.
but I found on google that there is someone who has Z9pe-D8 WS is able to successfully flash modded bios to use NVMe.
[Guide] How to get full NVMe support for all Systems with an AMI UEFI BIOS




I have read the solution in this thread below, which is Z9PE-D8 WS
[SOLVED] Flashing Asus Z9PE D8 WS for nvme Samsung 960 SSD: won’t boot anymore

I would like to know if how many ways I can flash modded Bios to make NVMe as bootable drive.
Thanks in advance and sorry for my English.