hahah, that's funny. overclocking is where you change the voltage output of your mobo to make your processor run faster (and hotter) than factory spec. i think you're gonna fuck this up if you don't do some research or get someone to help you in person.
look at this
selection of 7200RPM EIDE drives - you can only use Ultra ATA100 or slower drives, so don't buy one of the 133s.