I just replaced the harddrive on an ibook g4 800mh with a 250.0GB Western Digital "Scorpio" 5400RPM 9.5MM Notebook HD 8MB buffer but can't get it to boot. Drive works ok as an external, when installed can't get original install disc to book from cd (c key) or option disc won't show up. used superduper to copy system install (2nd tear apart) and reinstalled drive checking all connections. Any one have an idea for me? I have no idea were to go next. Thanks!