Hi, I just purchased the old Apple PowerBook G4 12'' and I wanted to use it as a spare machine for printing documents and stuff. I installed old Office '08 but I can't force it to run the HP Envy 4520 printer. The computer see it on the network, but the button 'Add' is grey and it doesn't let me to add this printer. I did some research on the Internet, and HP doesn't provide official support for OS X 10.5 Leopard. Does any one know if there is some old drivers somewhere? I don't know what to do .