With that setup, I have full control in BIOS over FSB, Mem, Core voltage etc, and can change my multipliers at will - no tricks required. The board is a rev 1.01, no audio running BIOS 1003. I played around some more and found out what the issue is, and it's not an obvious one. Make any changes to FSB and VCore and save, reboot.
Board fires up at new settings but at CPU default multiplier.
Power down, switch 5 and 6 to ON and reboot. The board will not boot. At this point, I was doing a power-off reset and getting the same result. Change whatever you want in BIOS and reboot. I then get the same error message, so I go into BIOS and find the settings I made unchanged.