Hey guys new here, I have a PowerBook G4 1.25GHz with 1/4GB RAM and 1GB on the way. I have been trying to upgrade the thing as it is up to leopard. I have Tiger and Leopard both in .dmg files, but Leopard won't fit on a standard DVD so I was looking to install Tiger and then USB boot the laptop from there to get Leopard. Here's where the problems started. I am having trouble getting the PowerBook to boot from the Disc Drive. I know the drive is working just fine because it's showing the disc on the desktop, so I go into the disc and click 'Install Mac OS X', when I do this it tells me to Restart. When I restart the computer just comes back to the Panther desktop, it doesn't go through any installs or anything. I have also started the computer holding C to boot from the CD drive and nothing still. I also started holding Option, I can hear and feel the disc drive spinning but it doesn't show in the active drives, only the 'Macintosh HD' shows. I'm a little stumped here, any help would be great as to how I can get Tiger to properly install. Thanks in advance!