I have this ISO and it's nearly 7GB. After looking in the ISO file I see that more than half of that is taken up by installer.dmg. I don't need an installer, I just want the live DVD. So out of curiosity I just simply deleted the installer.dmg file and burned it to a single layer DVD. When I tried to run it, as per the instructions I typed in config=live.plist and I was given an error that it couldn't find a file:
"/Library/Preferences/SystemConfiguration/live.plist"

I never touched that file, it's still there on the disc. Any ideas?