a Couple of 3d Newbie questions.....

I have successfully created my first few 3d models using MilkShape (no animations). I have a couple of questions now though. My goal is to create a set of sci-fi flying vehicle models that I can use to develop a sci-fi combat sim.

I want to be able to shoot individual pieces off these models in combat, for example a missile can take out an engine, or blow off a wing but leave the rest of the model in tact.

Do I make a different model for each component and then hook them together in the code?

I also want hits to different areas of the model to result in different amounts of damage and a different effect on the vehicles components.

Do I make different meshes for different damage areas?

Last thing, I want to animate different components based on input from the player, for example ailerons on an airplane.

Do I need to make each animated component individaully? Do I need a different model for each animation (example, aileron up and aileron down)?

Any input is appreciated....any links or pointing me to some good books on the subject would be very helpful. I see content on the web, but most of it seems to apply to models for first-person shooters.