Put card in TTX2 and test with real HDD/Dongle or Niko's multi.Once complete reboot - if splash screen shows modified text then it's worked.On my PC the caps/num lock lights flash during bios programming and it beeps once complete.
Run ' nvflash -index=0 -4 -5 -6 modified.Boot PC using a usb-pen with the image in the OP.Save to j:\TTX2\modified.rom (assuming USB pen is J:\ drive).Change card 'display text' so you can tell it has TTX2 bios.change device-id to '0292' (probably this already).Open j:\TTX2\original.rom (assuming USB pen is J:\ drive).Run ' nvflash -index=0 -save original.Put 7900GS card into PC - don't forget the 6-pin power lead or it won't work properly.