I think even if you could remap throttle and rudder controls to a Joystick using a 3rd party program (I think there is such software around IIRC) the problem is that the game is not programmed to be linear, i.e. you have simply X number of forward and backward speed settings and not a % that increases linearly with your input. And more or less the same for rudder, plus in both cases the game takes some time to rsponse, as it mimmics the delay in the voice order, the telegraph settinga nd lastly the helmsman acting on the rudder
