Here you go. Modded BIOS attached. Now includes all microcodes for 45mm Xeons. Just double check it's the right one for your board before flashing.
Reset BIOS to defaults before flashing and then do a FULL BIOS reset afterwards. Remove battery or use the 3-pin motherboard reset jumper and then load the default BIOS settings and allow it to boot into Windows on the first startup. After that you should be good to go.
I take no responsibility for a failed flash.
Gateway_R01.A2_BIOS_modded.zip 1444k .zip file