@glorifyday :
Since the topic “How to flash a modified AMI Aptio UEFI BIOS” has not much to do with the topic of this thread, please have a look into the start post of >this< thread.
Within the “ASUS” chapter you can find a tip about how to flash a modded BIOS successfully by using the AFUWIN tool with the added " /GAN" command.
Good luck!