I have a powermac g4 with the two 500mhz cpu's. I'm having trouble getting 10.5 to install. I'm currently using os 10.4 and am using a usb drive with os 10.5 on it. I've already tried leopardassist 3.0 and 2.3.3. 3.0 seems to simply crash the finder (not the whole operating system) when I instruct it to restart the machine. I'm then forced to do a hard reset to get rid of the beach ball. 2.3.3 DOES seem to work and restarts the machine and brings up the drive selection for booting. When I select the usb drive , it stays on the grey loading screen forever. The usb stick with 10.5 on it DOES boot correctly if I don't use leopardassist. I can get to the setup very easily but it simply says that the machine doesn't meet the requirements for os 10.5. I'm wondering if anyone with a dual 500mhz model has ever got 10.5 working. I'm a windows guy and mostly a mac noob , but I can learn if anyone knows what the issue might be. I understand the installer has to be tricked into thinking the machine passes its requirements , just need a bit of help with some other ideas as I'm fresh out of them.