I've a Gigabyte GA-7NNXP with nForce II Chipset, and a BIOS with a size of 512 KB.
nvidia chipset, right? no chance. nvidia has no wish to help.
That's a shame - I was thinking of getting a Gigabyte/nVidia board because Gigabyte now appear to have true dual BIOS chips on their boards. If it fails to boot from one chip it automatically switches to the other, you can reflash one chip from the other or from a floppy in the default BIOS setup, etc. it looks like it'd be a very handy board to use for testing - put LinuxBIOS in the main chip and have the default BIOS as backup. Then you can boot off the backup in case of a failed flash attempt and reflash LinuxBIOS into the main chip.
Looks like Gigabyte are introducing it on all their boards though, which is a good sign.
Cheers, Adam.