Overclocking with Award BIOS

My school was throwing away computers so I took one home. There's 768MB of RAM that I took from other computers they were throwing away, and I also took a 500Mhz P3.

It's an OEM Seanix system so I can't change any BIOS settings. Now, I want to overclock it. Using CPUFSB, I can get the CPU up to 633Mhz, but the thing is that I don't get enough voltage to my CPU. Does anybody know how to change that?

Also, I need to overclock my RAM as well. Does anybody know how I can do that?

OR

Are there any BIOS that I can flash over without killing my computer?

I am a total overclocking noob so I might have some misconceptions of things. Can anybody help?

Thanks