I'm guessing you're in the wrong folder in the command prompt. The CMD window will start in C:\WINDOWS\system32 by default. In my case, I created an fptw64 folder in the root of the C:\ with all the files I needed, then in command prompt, to get there, I simply have to type: cd\fptw64 Once you're in the right folder, it shouldn't have any problem recognizing the fptw64 command. - - - Updated - - - Unfortunately, it seems that the 3.05 BIOS has write protection on it that prevents custom BIOS files from being flashed. A number of us have tried (and failed) to get around this. I'm still hanging on for hope that a solution will come, but I'm not holding my breath. Also worth mentioning, once I flashed a 3.05 BIOS, I was unable to flash back to an older BIOS file.