It's better to do it in the BIOS. Do you have a fan on your north bridge?
running stable at what u suggested
5-7-7-24 timings (although i wish i could tighten them.. as my ram is rated at 5-5-5-15), 400fsb, 9 multi, 2.0 memory, but that makes it 800mhz instead of the 1066mhz it should be..
oh and i have performance enhance on standard just incase i needed stability.. would i be safe putting it to extreme?