https://mega.nz/#!XgABURCQ!yxLIpr67Adq0w...vsXbLorRXk
Hello ~~friend!!
I try to analyse bios with Z170 Extreme4 and extracted some image files.
Because there too much modules form bios ,so i only checked module which file size from bigest to 10k ,it already spend me a few time.
Image file's name also is module's name ,if you wanna to replace some image modules ,i suggest you need to make the same image resolution and format with original image then replace them.
You can use phoenixtool or uefitool to replace module.
There are some tips i give you.
Module "F7625B66-935F-49C8-9A91-0D655CA90D9F_3087" and "68BA3E2A-9992-47E6-A087-1C2CC9874CA5_2595" seem is bios background image.
They have different image resolution.
Module "517C0471-5B2A-4DEC-B00C-1837A543D850_3837" and "67F7D0B8-B769-44CD-A72B-B313870D34B4_3627" is ez mode background image.
They are also have different different image resolution.
The boot logo is consists of many images ,header of module "7BB28B99-xxxxxx" 、"494E3DF8-xxxxx"、"DDF9F6C5-xxxxx" are parts of boot logo.
You need to test them by your self.
Module "7BB28B99-61BB-11D5-9A5D-0090273FC14D_4893",it seem is bios boot logo that i consulted picture3 you provided.
But i think it is a disguise file ,i think module "DDF9F6C5-C17B-49C2-BBC6-BFFD8953283A_4908" is real splash logo.
My english is poor, i hope you can understander what i mean.
Feng