Yeah I use a flash drive to flash exclusively. Load the BIOS file on there and Qflash picks it up. Done this with many Gigabyte board models.

I even use it for vid cards. I actually formatted the thing and set it up as a Win98 boot disk lol. There's utils out there to do that. Gets you to DOS and then you can flash anything as long as the sys's BIOS will boot USB HDD.