Getting the file checksum is easy i think, not sure, but if you open HxDen and highlight the whole file, then go to Analysis (menu), then Checksum and choose the 16-bit Checksum, you'll get a number at the bottom.

We need an expert to tell us if that's the 'right' checksum, or the needed one, and how to apply it in the first place to the file, tried looking for any command in ATiWinFlash but couldn't find one, actually i found some Checksum related commands, but they're cyptic to me.

Anyway, i'm glad i could be of some help, good luck.


Note: don't know why you're getting blank screen, but i tried a lot of BIOS' with forced flashing, and they all work as long as they have the right memory size (256MB).