Alright Im currently expiriencing OS installation problems im currently running Linux Kubuntu version 8.04 and i want to dualboot without any knowledge i just installed the whole OS of linux, i was to put mac back on but when i insert my Mac OSX 10.2 installation disc and hold C at boot i get nothing but a black screen, what do i do to fix this i need an expert

iMac PowerPC G4 18'' 800mhz
Running Linux Kubuntu Version 8.10 LTS

HELP thanks