I can't speak for the real world because I've never been in an aircraft with a missing vertical stabiliser yet, and I hope to never do so either!
In AH however it is just a question of technique. Once you are upright, you can control your pitch as normal. You need to pitch down slightly, about ten degrees will do nicely. The aircraft may want to slew around when you do this. Let's say the aircraft starts to yaw to the left, presenting the right wingtip to the airflow. If you don't correct this it will flip over (rolling inverted to the left). If you roll slightly to the right, the aircraft tends to slew back into line, presumably because the wings present a larger surface area to the airflow than the horizontal surfaces. Then you must correct your pitch again etc. You just continue this cycle until you are near the ground / water. You will feel like the leaf that Filth describes. At the right moment you can flair out. At this point don't fuss too much to point the right way, it's your rate of descent which matters for a nice soft belly flop. Gear is optional but usually breaks off unless you're lined up just right (I sometimes think this buffers the impact though).
I hope I've described the inputs correctly because it's the first time I've thought about what you do, I really just fly by the seat of my pants. Once you get a feel for that kind of oscillating flightpath with the ailerons and elevators alone it should come naturally. Throttle work can also help to control your attitude. The point is to not give up, and don't panic even if you lose it completely, you can often pull it back. Be patient and look for those opportunities to reestablish the nose-low attitude. The prop will pull you along. Do what you can to try and get it down safely. Give it a try, it's a lot of fun.
