I think these are the files the installer is looking for. https://discmaster.textfiles.com/view/17834/MacAddict%20S%20Games.iso/Game%20Demos/Zork%20Nemesis/Zork%20Nemesis%20Demo%20Installer/Zork%20Nemesis%20Demo%20Installer.rsrc/STR%23_5000.txt
I wonder if *ZNemDemo* had been an invisible folder that MacAddict was supposed to include on the CD somewhere, but missed because of the invisibility flag.