oh ok. yeah i'm still experimenting too, and am by no means an expert. The basic idea of OCing is to raise your Front Side bus, and keep your system stable. Your FSB is multiplied by your CPU multiplier to give you your total speed. So if your FSB was 210 mhz, and you had a multiplier of 10, your cpu speed would be 2.1ghz. Sometimes you have to raise the voltage given to your cpu to get a faster speed.
That's the basic stuff, other people can get into all the stuff about memory dividers, and so on.