QUOTE
The disk I have is a copy from a reputable source...
Um...Petalbear, do you mean that it's a full retail version or is this a CDR that someone burned? Because if it's the latter, that's the problem. You can't copy OS X install disks...even to have as a backup copy. It doesn't work. They may look ok, but they won't boot your machine or install OS X.
Just wondered - you may have meant it the other way and I'm grabbing at straws here.