Also, how do I overclock my cpu and will that help run the game better?
Overclocking your CPU can help you get better FPS since the game is CPU dependent. But Overclocking is something you ought to do at your own risk ! To start off, you need to get a good cooler for your CPU. Never do overclocking on stock cooler. http://www.tomshardware.com/reviews/athlon-ii-x3,2452-4.html
You can google for guides for overclocking.