Can't do it yet, the dev team will have to write iFly code that will allow the NEAM output of X-Plane to be taken into iFly. And, we will have to have a cable to interface the computer output to the iFly input. Walter said this is a low priority, but they will consider it later.
If we all think that using iFly with Fight Sims is a good idea, please cast a vote so the Dev Team can judge if it worth their time.