you will need to increase the fsb cos most processor multipliers are locked. Try a couple of Megas at a time and if you system becomes instable try at a little more voltage to the core. If you can boot then just reset the bios using the jumper. Note that this will invalidate any warrenty you have. Good luck and let us know how far it will go.
so your fsb is set to 167 and your multiplier is set to 13x. increase your fsb to 200 and make your multiplier 11x. also make sure your memory is running synchronous (1:1, 100%) with your fsb. the system should have no problems coping with this.
your core speed will be 2.2ghz but your fsb and memory will be running faster. heat shouldn't go up much at all and your system will be more efficient. if you want, you can try a multiplier of 11.5x (2.3ghz) and, if still stable, 12x (2.4ghz).