I have modded a bios and preformed a SLIC mod with Andy's Phoenix/Dell EFI SLIC Tool then flashed in dos and all works well. I then went through and re modded the image to customise the logo's and in the dump folder it has American megatrends logo's in it and now I'm a little confused but it is listed in Andy's tool as a efi inside bios. I'm surprised it has AMI logo's in an Inside EFI bios image direct from gigabyte or is this trickery normal ? Here is the link to the bios (sorry I cant post direct links as I'm under the 20 post threshold): Code: ://download.gigabyte.eu/FileList/BIOS/mb_bios_ga-990fxa-ud3_v.3.x_fdk.zip
Have you tried the changelogo tool found in the bios tools section. UEFI bios' basically have two jpg's, a 1024x768 for legacy and a smaller jpg for uefi.