I am selling one of my Powerbook G4's, but first I need to format it and install Leopard. I securely wiped the hard drive with disk utility and then began OS X Leopard installation, but it continues to fail with each try. The installer runs for about 5-10 minutes then gives this error... "The installer could not validate the contents of the 'EpsonPrinterDrivers' package. Click restart to restart your computer and try installing again". I skip the "checking installation DVD" because it fails around 15%. The actual Leopard install seems to get farther but fails in the end. I must have tried 7 times to install it! The Leopard disc I am using is a copy of the original retail disc. I used it a few years ago to format an eMac and even used it on this exact Powerbook G4. If you look at my post history, this was also the disc JAMMED in my OTHER Powerbook G4. Now there are some tiny scratches on the disk and I tried cleaning it, but no luck! Would I be able to install Leopard via target disk mode from an Intel iMac or is the installer still going to fail in the same spot? --- Post Merged, Jul 7, 2016 --- Darn! It got farther this time but still failed. Around 65% before the beach ball appeared and gave the same error. I kept the screen on by moving the mouse; Not sure if that made a difference.