Google is the right direction for a complete novice, complete with the words 'q6600' and 'overclock'. Failing that, the faq at the top of this section is a very good thing to read through.
Otherwise it's not really possible to walk you through it. Or at least, it'll take far more effort than I'm willing to put in for someone who wont research anything himself.
Basic algorithm
Settings to minimum voltages, ram to stock, cpu to vid, increase fsb until fails stabilty test, increase vcore & retest until stable, increase fsb... stop when voltage goes over 1.5V or temperatures over 70.
Anything beyond that would be far easier to explain to someone who's actually read something about the process. That the majority of it is informed trial and error means posting a complete list of bios settings, stating when you were last stable and what you've tried to get it stable so far, will allow us to advise what to try next. However that process isn't going to work very efficiently if you wont find a guide on google first.
But hey, perhaps someone on here will be friendlier and more inclined to help those who wont help themselves. I'd be thrilled to help, but only if you're willing to put effort in as well.