I'm using a G4 1.5ghz PPC 32bit Powerbook
I followed the instructions on this site.
But could never get my powerbook to boot up from the usb drive.
I can not use a CD because my DVD drive is busted. Thus the need for USB.
Also most of the usb partitioning and install instructions are for people using linux already. I need to create the disk in mac osx only.