Hello, I recently picked up an old iMac G4, 700ghz, 512 ram, 80g hard drive for very cheap.My wife thought it was cool, retro machine that would look good in the kitchen nook! lol I have two questions: 1. Tiger is installed on it and did not come with disks and the there is a admin password on it from the previous owner and I have no way to contact him. Is there a way to access this to change the password? 2. Is this machine capable of running Leopard or do I need to increase the ram? I now it can run an OS beyond this one. Thanks alot!