Also, laptop overclocking as realy not a good idea due to the fact laptops get hot enough as it is because everything is crammed up inside the case.
I thought about it once but i decided not to or i might fry the thing
Since you are using Windows XP Pro, service pack 3 im assuming, I would recommend just tweaking your OS settings, instead of messing with your hardware.
First go into C:\Windows and delete your "Prefetch" folder, dont worry, it is safe to do so. ...