Thanks for the link -- I guess what I'm really asking is:

Can I put this

http://cgi.ebay.com/Apple-PowerMac-G4-Quicksilver-800-MHz-processor-HS_W0QQitemZ190244586323QQcmdZViewItem?hash=item190244586323&_trkparms=72%3A392%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14

In a Sawtooth?