I have a Powerbook Power PC G4 (1.5) running 10.4.11. I want to update to Leopard. I don't know how to find out if my machine is UFS formatted. I assume the update would have to be done by Mac technicians if it is? I also read something about speed affecting whether the G4 can run Leopard. Is that bus speed (Mine is currently 167 MHz) or CPU speed (mine is 1.5 GHz)? If it is bus speed, can it be increased enough?