Hi, I just got a new powerbook g4 laptop. Came with no OS. I have been trying to load Ubuntu (linux) and I can't seem to boot it from a cd. the cd is a burned .iso file. I have tryed holding down C , as well as many other tricks... Once it's on it comes to a screen with a little folder in the middle. and has the apple logo looking face and it flips to a question mark as seen in the pictures below. Anyone know how I can load this or what?