Hi, I have a 1.6 PM G5 w/ 1.25 GB RAM, nVidia 6800 GT, 80GB HD running 10.4.2. I have had problems with freezing and have checked every hardware component that I can (RAM, HD, Peripherals, Video Card) and they all seem to be functioning properly. I know there are many message boards commenting on G5 freezing, and even a faulty PM spotted (SP 1.8). I read on one that a lot of people started having problems when they moved to Tiger. Willing to try anything, I decided I would move back to 10.2 as thats what the computer shipped with and is on the original system disc. When trying to boot of this DVD, I can get to the white and grey apple startup spot and can hear the optical drive fire up. Soon after a grey screen covers the white background and I get a message that I have to restart by holding the power button down. I have tried holding down option and selecting the DVD and holding down C just to boot from it and all have the same outcome. I also tried booting off my iBook panther discs and the same thing happened. Please, any advice at all would be great! Thank you!