Although his RAM might be a bottleneck in his overclocking, it shouldn't prevent clockgen from increasing the FSB.
modgod: You have PC2100 RAM, which was meant to run at 133MHz, the CPU you have is meant to run at 166MHz FSB. Unless the RAM you have is really great and can run at 166MHz FSB, then great, but I somehow doubt it. You can't unlock your processor. there is a workaround but it doesn't work on nForce2 chipset so you're pretty stuck. I would recommend you get PC3200 or higher rated RAM, and find that FSB setting in the BIOS, because FSB overclocking is your only option. Download CPU-Z, look at the CPU speed and RAM ratio, the speed should be 1833MHz (166x11) and the RAM ratio should be 1:1, if the CPU is running at 1467MHz, then you're underclocking, and you need new RAM to get it to run at default speed, if the ratio is not 1:1 then you're losing performance, and should really get higher rated RAM so you can run the RAM in sync with the FSB