I readed the changing part in the article and now I understand what you're trying to do.
I guess you're trying to flash the BIOS from a DOS/Win9x boot disk.
I would double check if you have exactly the right BIOS and flash utility. If you're using a pre made BAT file to flash the BIOS check if the BAT file has the correct file name into it. Also check you're using capital leters right if there are any in the name of the BIOS file.
My CPU runs so hot the arctic silver undergoes nuclear fusion