Hmmm, it didn't work.
AWDFLASH says "The program file's part number does not match with your system"
Flashing it anyways shows the following errors:
When I select "STANDARD CMOS SETUP" in the Bios it freezes showing only the lines Primary Master and Primary Slave.
"IDE HDD AUTO DETECTION" shows a red box with "Auto-Detecting Primary Master" and a "2" four lines below.
And there ist a bug which is also present in the official Bios v1.5, which causes my system to show all Drives as write-protectet (Write protect error writing drive X), with the v1.0 Bios it works fine.