Ok so heres the deal, just got a powerbook g4 with a bad hdd. replaced it and got a bootable usb stick from a friend that has leopard on his macbook pro. I power up with usb stick in the powerbook and all i get is a flashing question mark in a folder. Tried to boot in recovery by pressing and holding control and r but nothing comes up but that folder. New to macs and im completely clueless on what to do. also this is a full retail ver. as what i have been told.