1) download and instal on all workstation (steam) Wolfenstein: The new order
2) download and instal Sandboxie from official site http://www.sandboxie.com/index.php?DownloadSandboxie
2.1 ) if you use steam exit on all worksation
3) Run on first workstation Wolfenstein: The new order them go to Settings > video and set windowed no boarder
4) First player can stay in game. Second do the same thing but before launch Wolfenstein: The new order Run steam by Sandboxie -> login and choice your game
4.1) Or if you hawe that game without steam just run by sandboxie
5) thats all enjoy killing hitler 🙂

(remember if you play on sandboxie the game will not save!!)