This is the F9 release BIOS. Tested successfully on a revision 1.0 board.
Disclaimer: BIOS flashing is, of course, a potentially risky operation. All the mods below have been flashed and tested successfully, but I am not responsible for anything that happens due to the use of these mods.
Board model: Gigabyte H55M-UD2H
BIOS type: Award
BIOS version: F9
SLIC OEM: Acer[ACRSYSACRPRDCT-ANNI]2.1.BIN
Mod method: SSV3
Download: http://www.box.net/shared/fbq5xcrg7t