Tested on Abit BF6 with coreboot Abit BE6

1. Clear CMOS with jumper on motherboard or remove battery

2. Boot PC from CD WinXP SP2 Pro installation media

2. While 'Press F6' is displayed press F5

3. While 'Press F2' is displayed press F5 one more time

4. Select computer type: Standard PC

5. Set date and time in NVRAM (CMOS):

WinXP OS boots and working OK :-)