Never a worry - I stand by LSD's statement on TweakTown: "I don't know everything; I make misteaks alll the time, and my spelling is often atrocious!"
If you were to try to flash a truly 'incorrect' BIOS, i.e., one from another board or some such, you might wind up with a disaster on your hands, but, then again, I doubt it. You have the 'dual BIOS' setup, and my experience with 'dumped' flashes has been superlative; I have flashed a single bad file
twice (mainly, because I didn't believe it could be bad, and still pass the checksum process), and had another try crash - and my board simply 'reverted' to the 'as shipped' BIOS, two revs back! There is always risk - the best way is with a floppy and the 'built-in-the-BIOS' flasher, on a UPS, just in case of power failure at (as Murphy and his Immutable LAW would have it) at the absolutely wrong moment. The reliability of the dual BIOS has me seriously wondering WTF is with @BIOS, as
numerous people have managed to 'brick' boards when it (inevitably, if you use it enough) screws up? Something in @BIOS seems to me to be capable of trashing the actual dual-BIOS 'recovery' code - dunno what else it could be!