All Installers Issues

I have unrar'd the files for Generations, Outdoor Living, Town Life Stuff, and Medieval with StuffIt Expander and every launcher says it "Could Verify the Integrity of the Installer". Am I doing something wrong, or is there some kind of fix I can do? I do not have any expansions added. Thank you.

You didn't read the guide then. You need to use disk utility to create .dmg files for each game.

I did that. It didn't work.

When you copy the unrared files to the disk image, you must only move the files!
NOT THE FOLDER. Go into the folder and copy all files, then paste all files into the new disk image. Hope that helps. I got stuck there too.