He 111 never used this weapon operationally.
As Lusche pointed out, we do not have the airplane that was used operationally to launch the Fritz-X. We would need the Do 217K-2 bomber to be added to the game for the Fritz-X to be used.
The Hs-293 was dropped from the He-111 tho....not quit as user friendly but it will reach out farther.
http://www.youtube.com/watch?v=rqOVXnNUcYo

"Germany developed the Hs 293 air-launched missile in World War II for use against ships or ground targets. It was basically a glide bomb assisted by a liquid-fuel rocket that fired for 10 seconds. The Hs 293 was carried under the wings or in the bomb bay of an He 111, He 177, Fw 200, or Do 217 aircraft. Its warhead was a modified SC 500 bomb containing Trialene 105 high explosive. A bombardier guided the missile by means of a joy stick and radio control.

Beginning in mid-1943, Hs 293s sank several Allied ships, mostly in the Mediterranean theater. Although Germany developed many experimental versions, only the Hs 293 A-1 was produced in quantity."
