I've never used a USB drive to do this, it might be possible, but I can't recommend it.
If you are not having any issues that are exactly addressed by the bios update then do not do it.
I knew of Freedos ,dosemu etc ,but Any lead ,for How to Format to DOS File System(? Thanks As much as I remember, doesn't support booting from this filesystem.
The only thing I suggest you to do is write a pre-made image of a bootable floppy on your flash disk, by using dd. There may be detailed instructions as a README in the BIOS file that you download. p=51 ^I've downloaded latest AFUDOS utility from AMI Website to use with the fdos floppy Even made the ISO using genisoimage(it spewed off some message about input-character is assumed as utf8 or so.cp437 is for "real" DOS, I presume).
I need Help that to how to format USB drive and what all DOS Files are needed?The only thing I suggest you to do is write a pre-made image of a bootable floppy on your flash disk, by using dd.And afterwards you should be able to boot from your pendrive the same way as booting from a floppy PS: Also I would suggest you to not change anything in BIOS, as long as it works good for you.When you use the usb to re-flash the MB has a basic OS that can find the file in the root directory.That is all you usually have to do is download the file and save it to a fat formatted usb flash and reboot and select the utility.