I think it's possible, but the front wheels wouldn't turn when you steered and you'd have to do some fiddling with the config to stop it being able to turn on the spot.
The other option is to do what was done with the TOW Humvee that was released and to config the misile launcher as a gun and give the bullet the same damage values, speed etc as the missile but as you want to do an AA missile it would be very hard to use since you won't be able to lock onto the target.