So how can i overclock?

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http://androidforums.com – Hi, i have an optimus elite, rooted with poot. How can i go about overclocking? it slows down and lags when playing temple run and other 3d games. I also would like to have apps start faster and such. So is there i guide that i can follow to overclock this? I looked around and i couldnt find one. Also, i don't want CM9 because i rely on the camera on this phone daily. [edit] i dont have a custom recovery or kernel, btw, its just rooted. So please help me on the next step i should take after i root it. Thanks! (General)