My computer isnt allowing me to flash my 5900 to a 5950u

[Blackroot]

I was trying to flash my 5900 into a 5950u, i made the boot disk, put nvflash, and the 5950u bios on it, when i went to flash it, it said ERROR: board id mismatch, anyone know what i can do to avoid that, and successfully flash my card?

 

[dwrobert]

you need to use the command nvflash -5 -6 bios.rom that will bypass the error message