I installed 10.5 on the spare G4 tower kicking around the office. I slapped 896Megs of ram in her, and a newish 40gig drive. I installed 10.5 via the Target-Disk-Mode-Method. Install took around 1.5 hours. The machine boots up fine and has been rock solid. It is a bit pokey, I'm not going to lie to you. I think once I flash a spare Radeon 7000 card to mac and swap it with the Rage128 it will be much better. The Rage sucks so hard I can't even run screensavers. I just finished installing Office 2004. I have plenty of ram to run whatever I need, but boy that 400Mhz hits hard. Load agerages: 4.13 3.23 2.67. This was fun even if not all that useful. But hey, I'd like to see someone install Vista on a Pentium 3 450Mhz! (closest chip I know of).