Apple Laptop Wont Start Up

kernel panic
i was installing MacOSX 10.4 tiger,i had 10.3.9 panrther. When I insert Disk I was told to restart the
computer to begin the installation but the cd had Scratches so i had to stop in middle...n after i stared my laptop again i could only c the grey screen with apple loading icon, that y i taught doing this :

Hold down Command-Option-O-F to go into Open Firmware. Once in there, type "reset-nvram" and hit return. Once returned to the prompt, typr "reset-all", hit Return, and the Mac will reboot. Be sure to leave out the quotes on both commands.

Then after doing this i found the "kernel panic",,,,
 
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