Wasting your time. Most notebooks have very well balanced power and thermal characteristics; overclocking even if possible could easily cause damage to a number of subsystems.

Speaking of overclocking, my Pentium M desktop is finally starting to die after sustaining a 25% core overclock and 73% FSB overclock for about a year (from 133x15=2.0 GHz to 230x11=2.53 GHz). The main cause of this I'd wager was running the CPU at 0.12V over-spec (1.356V to 1.475V).