I can't seem to figure this out. This is what I have done thus far. I have an external firewire drive and I made an iso of Tiger (from Original CD). I used Disk Utility to make what I think to be a bootable firewire drive. I selected the ISO as the source and the External as the Destination. When I hook up the external to the ibook and hold down the options key I have a gray screen with a refresh and and right pointing arrow. Nothing else. What am I doing wrong?