Ok so i have been working on a project for a while now on and off,
i started it in xna 3.1 and then moved it to xna 4.0,
before i put the final touches to it i decided to test the one click, it creates the package as described in your tutorial, great!,
i can install the game and play on my computer,
i had a few friends test it out, all the ones with xna 4.0 installed worked fine however all the people without xna got through the install but when they try to start the game nothing happens.
Thanks for reading this blurb!