Hi, A while ago, I got hold of an old Power Mac G4 (450MHz, 128MB RAM, OS X10.3) which I haven't dug out until now. As it contains the old owner's data, I thought the best thing to do would be to do a clean install of Tiger. I bought a Tiger DVD set and upgraded the RAM to 1GB but the DVD won't boot. The DVD is mounted in OS X and I can access the launch screen which has a button to restart and upon restarting, OS X just boots again. I have tried pushing C and Alt (I have a Microsoft Bluetooth keyboard as the Apple one has been misplaced - Could this be the problem?) but nothing appears on the the display for a while, then OS X boots. I have also tried setting the Startup Disk to the Install DVD which doesn't work either. I was also thinking it could be the DVD-ROM drive as the button to eject is in the center whereas the drive's eject button is on the right (so I am guessing it isn't an original part) Any ideas?