1. Im thinking to go back from Leopard to Tiger on my PowerBookG4 1.67GHZ, yes i think it might be faster, and to be honest why shouldnt it be. I mean PowerPc cpus should be optimised for Tiger and not Leopard, am i not right? 2. Whats the procedure to go back from Leopard to Tiger, i have the Tiger dvd, what should i do to make the "go back" transition?