i looked through the manual online.. and found that the board only supports 66, 100 and 133mhz FSB's.. you CPU is on a 100, so to o/c it, you have to go up to 133, which i highly doubt will run as 3.5x133 = 466mhz.. even if the CPU can take that. your PCI bus will be running way out of spec, 44.3mhz, and i doubt, even more so, that you HD or AGP card can't take that.
you can upgrade the processor though.. it supports P3's.. all you need to buy is a socket 370 to slot 1 adaptor and away you go.