Hi, I'm new to this, so be gentle! I run 2 G4 desktop macs, with OS 9.2 installed. I did try OS X 10.2 (Tiger) but the mac's ran slow in Classic mode. Last week I bought a secondhand 2.3GHz G5 desktop machine, running OS X 10.5 (Safari) The problem I have is that I can't run my earlier version programs in Safari. So I would like to reformat the hard disk in the G5 and install my earlier OS X 10.2 (Tiger) instead. How can I do this, please???