If he's got a PII, then it's slot one. As for FCPGA/PPGA, well using a slocket, you could on that system if it supports Coppermine's, throw a Celeron 800-1GHz into a Slocket and then the Slocket into his computer. But, if u get PIII's don't get 133fsb. His mobo no doubt won't support 133fsb (offically), only 100.