I would just go with FI. This is from the book just read what it is telling you to do page 70.
Updating the BIOS with the Q-Flash Utility
A. Before You Begin
1. From GIGABYTE's website, download the latest compressed BIOS update file that matches your motherboard model.
2. Extract the file and save the new BIOS file (e.g. X58AUD3R.f1) to your floppy disk, USB flash drive, or hard drive. Note: The USB flash drive or hard drive must use FAT32/16/12 file system.
3. Restart the system. During the POST, press the <End> key to enter Q-Flash. Note: You can access Q-Flash by either pressing the <End> key during the POST or pressing the <F8> key in BIOS Setup. However, if the BIOS update file is saved to a hard drive in RAID/AHCI mode or a hard drive attached to an independent IDE/SATA controller, use the <End> key during the POST to access Q-Flash.
Put it on a USB flash drive
Once the bios is done what I do is shut the computer and unplug the power then clear the cmos and pull the battery. What about a minute and move the jump back for the cmos and put the battery back in reboot.
Enter BIOS Setup. Select Load Optimized Defaults and press <Enter> to load BIOS defaults. Reboot go back into bios then set up everything backup again plus time & date too. Make sure the computer boots back into windows first before you swap out CPU's.