The packages from CaptainSim have always impressed. Very well done art work, and amazing attention to details.
My suggestion is to keep up the work on modeling, and flight dynamics of approach, and landing.
However, trying to do full missions is simply not something worth while in the current iteration of the game engine itself. It simply doesn't support that level of complexity without so much work, and code, you'd end up spending as much, or more time developing the craft as the makers spent making the engine. But, to stay on topic, the best way to go about getting a superficial means of launch in game is the towing idea. I have to admit that's about the only thing in game currently that could make that happen.
My suggestion for those that really want to play with a full mission of launch, and such is to get Dr Martin Schweiger's orbiter sim.
In fact, what I am /HOPING/ to accomplish, is those that are in the flight sim community will get behind this particular sim and help get more interest in the modeling so we can get better looking, and behaving ships

I love FSX for flights when I want pretty scenery, and a reasonably accurate flight model, and flying experience (navigation, etc.). I run X-Plane when I want that over-the-top realism in flight characteristics, and the ability to see what maneuvers I'd have to do IRL setting an Osprey onto a moving ship. When I want to experience from beginning to end the vast complexities of getting a ship from ready to T/O to ISS docking, I go for Orbiter.
I hope to inspire CaptainSim (with money, if not with words

) to make a model or two for Orbiter!