I have a powerbook G4 and i want to install linux onto it. Debian or Ubuntu or anything. I just want my g4 to run linux with the ability to go online through airport. I have downloaded the iso files and burned them using imgburn but when i try to install on the mac the cd doesnt show. i cant boot into ce, i think thats the problem. I tried holding down c and also options but none of those work. any suggestions and advice? thanks.