Its was simple actually.
First, Open AFUWIN64 as administrator, then click save. This will dump your bios file to the desktop if you save on desktop.
2. Next Open AMIBCP_v5.0.1
https://drive.google.com/open?id=0B00AUrOvPe4GN3RUTzlHZU5LdTQ3. Open the bios file that you just dumped using AFUWIN64. Now you will see something like this :
open up sub menu you will see :
Change the access/Use to USER or SUPERVISOR, Try if Changing to USER not work then use Supervisor.
4 . Then Click file, save as new file. so that if new modified file encounter error during flash, you can always flash back the default dumped version.
There are tons of treasure to play around. You can unlock alot, alot of options.
Do update here if anyone make the overclocking from bios work.
I found that FULL desktop overclocking feature are in there, exactly the same setting in ASUS ROG Motherboard. But maybe advance hex editing skill required to make them work.
if you are much more advance, you can now utilize the debug port in the motherboard and enable communication with the motherboard to do whatever engineer does.