hmm , how exactly can you raise the multiplier if the multiplier is locked on all cpu's sold today with the exception of intel extrememe cpu's ?
the normal way is as above , up the fsb , normally in small incriments till it runs unstable , then set the fsb a few below this say it is unstable at 250 i would got 245 and test stability , you may also need to raise voltages to makeit stable but i got my p4 2.8ghz up to 3.1 on stock voltages , i didnt wanna raise voltage cos of northwood sudden death syndrome as it is called