[Guide] How to flash a modded AMI UEFI BIOS

BIOS/UEFI Modding BIOS Modding Guides and Problems
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@acidburn87
You can use either the tool AFUDOS or AFUWin, both should be designed by AMI for Aptio IV BIOSes.
If you want to use AFUDOS, you have to boot off an USB stick running MSDOS or FreeDOS.
If you want to use AFUWIN or AFUWINx64, you can flash the BIOS from within the related 32/64bit Windows OS.
In both cases you should use the older version 3.05.04 of the tool (links are within the start post), because the newer ones do not support the " /GAN" command suffix.
You will have to flash the BIOS twice:

  1. The original BIOS as *.CAP file (with the capsule header) and
  2. the modded BIOS as *.ROM file (after having removed the capsule header).

For details please read >this< guide written by OldGuy (the link has been fixed by me within the star post).
Good luck!