sry, dble post.
To answer your question - it is possible, just not with your current motherboard. I OC a Dell pentium III, but had to find a used computer parts store, and new (old) Pentium 3 motherboard. In my case, I just baugh a whole pentium 3 (with ASUS MOBO) for 30$. Mine came with jumpers, so it limited what I could do anyway, but if you can get one without jumpers that'd be the best option.