Bios Mods - The Best BIOS Update and Modification Source

Hello,
I've been trying to mod my bios (Change the logo),
on my laptop: Acer predator G9-791
Drivers page: here
Original BIOS FILE: here

I've used Phoenixtool256 to dump and edit the logo modules with the No-SLIC option enabled,



and it's done successfully.


When I click OK the system reboots and the flashing process starts, but I get this Invalid firmware image error instead.


I've heard that you need to edit the iscflash.dll file and I tried to do some reverse engineering on it, but I can't get there.
I have a little bit of reverse engineering knowledge, Any help?

Thank you very much.

I've tried to use Intel Flash Programming Tool, first I got a backup using FPT.exe -BIOS -D BIOS_BAC.bin
Then I've tried to flash it again with/without modification: FPT.exe -BIOS -F BIOS_BAC.bin
But I got the following error: "Error 316: Protected Range Registers are currently set by BIOS, preventing flash access."