You should really search before posting. I am going to assume you know what overclocking is, and not bother defining it for you. Check out these other threads for more assistance. All I do is install NetRipper’s Msm7KCpuSpeed application. This gives the ability to overclock your processor. Then you need another app or script to basically control this one to make sure it is running at the speed you select for your processor. I use the tried-and-true method of SetCpuSpeed-1.0d.cab installed to my SD card. Some people use other methods to better control the processor especially when it is not in use – in effect underclocking it – therefore conserving the battery. Good luck, and have fun.
http://forum.ppcgeeks.com/htc-touch-pro-2/138644-anyone-overclocked-their-tp2.html
http://forum.ppcgeeks.com/htc-touch-...g-nrg-rom.html