on the steam top left corner there's a bunch of "dropbar" thingies one of them says "games" press it and the lowest option is "add a non steam game to my library" press it and it will let you add games to steam.. now scroll down untill you find crpglauncher.exe Tick the box and press the "add selected programs" button. Then you're good to go.
FOR me it didn't show when i scrolled down so you must manually find it by pressing the browse button.