It also works with Windows 7 Ultimate x64 Dell OEM SLIC 2.1 table is also detected in SLIC DUMP Toolkit. Thanks again ps500! Edit: I refer to the modded Dell Optiplex GX280 BIOS.
regardless of the system architect, the bios are the same. what you can do is to copy the file (IMV-038.exe IMV-038.rom that i modded) overwrite the ones in the x64 package.
imatrix, just tried exactly what you suggested (overwriting with the two modified files), still got the "WFlash Error, Open flash.sys Fail" message. Using cygwin's "hexedit" of your modified IMV-038.EXE, I found a reference to flash.sys at location 0x400EC. For some reason, IMV-038.EXE cannot be executed in my x64 environment. I even tried compatibility (WinXP SP2 and Win2000) mode, still same results. I installed Win7 x86, ran the flash program exactly as you specified. It automatically shut down after the flash, and now it's not even posting. Time to read the recovery forums...
That's the reason I posted the non-gateway link to the bios, the one on their site doesn't flash in Windows 7 x64 even though it's for x64. It's missing files, the one I uploaded to rapidshare actually flashes successfully in Windows 7 x64.