the SIMPLE answer would be to change your FSB from 266 to 333. Make sure your RAM divider keeps your RAM at same speeds so that you don't overclock your RAM while you are overclocking your CPU. Done and done!
266x9 = 2394 or approximately 2.4GHz at STOCK.
333x9 = 2997 or approximately 3.0GHz overclocked by a simple FSB increase.