There was a catch though.. I could not run SETUP on a newly installed Mojave, I could only run the apps if I had it already installed on high Sierra. So what did I do? Simple. I opened the disk image, opened the "Adobe CS3 Design Premium" folder that has the Setup.app and I CONTROL-CLICKED it and selected "Show Package Contents" then navigated to "Contents/MacOS" and double clicked the Setup terminal app and Wa-lah! It installed on Mojave. Only thing I didn't install was CS3 Version Cue since there will be no update to this software, but Photoshop, Illustrator, etc etc, apps work just fine.