EZ Flash is what I used on my Asus motherboards and honestly, I prefer that to using whatever Windows based utility they provide. In the past, those were known for potentially bricking Asus mobos.

got the p/i-p55t2p4 motherboard from asus. i just read a tomshardware article on getting it to run a k6 cpu chip. i downloaded the latest bios from the asus site and used the aflash.exe from asus too ...