I have decided to downgrade to tiger this weekend and I have encountered a big problem. My disc drive only reads have the time now and when it gets past 1% installation on the disc it says that the installation failed. I have put the hdd into a powerbook g3 that only could go to panther and tried upgrading but it did the same thing in the powerbook g4 when I tried. Are there any other options to getting this thing to install or could you show me a low price for a replacement drive. Thanks