Overclocking my PC?

Hey,

I know about nothing of computers, but I want to try to overclock my computer.
I don't know if it's even possible with my configuration (or doesn't that matter?)

Could you guys point me in any direction on how to do this? Some useful articles would be nice ...

This is what my computer is made of:
http://www.ee13.com/Report.htm

I'm aware that it's not a great computer, but it does the job for me (photoshop, dreamweaver, CS, ...) Ow and I need to buy some ram urgently too )

So any suggestions?

Thanks.