If u dun wanna unlock the CPU, just make sure the CLK1 jumper is set at 133 FSB. The up the FSB in the bios to say 140 w/ vcore at 1.80v & RAM voltage at 2.6v. U should be able to hit this easily.
Then, up the FSB by say....3 Mhz at a time until instability occurred. Up the vcore, a bump up the FSB again.
Small increment in FSB O/cing is recommended. If the PC dun POST. Clear the CMOS & try again.
Enjoy.