None of these modded bioses did anything for me. Not even a single MHz increase.

Maybe because I am already border line? I am running a E8400 @ 4.5Ghz on air, stable 24/7.

500Mhz FSB. But when I try, even 501FSB, the system becomes unstable. It is really weired...

Oh well...I will be waiting for new bioses and see if they help break the 500FSB barrier.