I've never looked into it, but I bet it's possible to use another program to create an exe. Basically you would take your Quest install and your game file, and use this other program to create an exe that would automatically play the game with Quest when run. You might have to bundle all the Quest.exe and game files into a folder, and then have a separate game exe your friend would click on. Seems like there are a lot of programs to do it,
https://www.google.com/search?q=windows ... xe+program