Help I can't figure out how to install X-COM or Tie fighter so that I can find them n windows and move them to my old games folder

Hey out there I am very innept all I want to do is get my old X-com UFO defense game to work and Tie- Fighter, I have installed DOSbox and I have its own little folder but I don't get how to install these old games onto or into the desk top or make them go into their own folder I am inept can some …