Trouble Upgrading from 10.3 to 10.5

[roadbloc]

A friend of mine has a PowerPC iMac G5. We are not sure which exact model it is, but I had a look on MacTracker and the G5 iMac models that look like it that originally came with 10.3 are supported by 10.5.

Borrowed a genuine copy of 10.5, and whenever we try and install it from both the desktop and by C at startup, we get some sort of kernel error...

I'm sorry I cannot provide any more details. I was wondering if anyone had any suggestions on what could be done next.

 

[666sheep]

First question: what means "genuine" in this case? Is it Retail (box) version or gray (dedicated) discs?
However, would be nice to know more details, you could find this iMac's specs at the bottom of its stand: http://support.apple.com/kb/HT1749