Hi. Yesterday i atempted to install mac os 10.5 to my powerbook g4 1.67, it didnt go well so i had the hard drive formatted via target mode and atempted to reinstall the original 10.3 the disc loads up, but i cant get past the welcome to mac os installer window. i click on continue and nothing happens. I also tried the same via target mode in case it was a bad optical drive, but the same thing happened. then i also tried the disc in a different pb and it works just fine. The 10.5 disc doesnt load at all- i was waiting at least 15 mins on the grey apple screen and nothing hapened. What could be the problem and what should i do? thanks