Well for one those p2's are a royal pain to overclock. I'd recommend looking through several sites on how to overclock.
www.sharkyextreme.com www.arstechnica.com are a couple I'd recommend. Also really your best alternative right now would be to bite the bullet, go out and mow some lawns clip a few hedges sell yourself on the street corner etc and get yourself a nice cheap celery as those overclock very nicely, also a duron would be a very good investment if you're an amd fan. Hmm I'm digressing ... well yes you probably really won't get much out of overclocking for it to be worth your while. Tata!