Right now, I don't think so unless companies like Boeing start building their own simulators on top of FSX. Right now, a pilot must be certified to fly a plane,

Right now, I don't think so unless companies like Boeing start building their own simulators on top of FSX. Right now, a pilot must be certified to fly a plane, which might include simulator hours. The airplane manufacturer then builds their own simulations, as far as I am aware. It's a great question though to wonder whether it wouldn't be cheaper for companies to build the simulators on top of something like FSX. Create something like the upstream training where you can train, until you get to the "production" simulator from the manufacturer, where you simply prove you have the required knowledge as a pilot.