Most of the 3D planes I've downloaded, especially the larger Cap's all use the same program values. Can someone explain what some of them mean, and what they do?

I'd like to get some of the planes to "feel" like my plane for instance.

Why are there three CG values, and what do they actually do?

What do the Lift and Drag values do in the fuselage area? There is fuse drag, lateral drag and vertical drag?

It would be nice to know what to change to accomplish a certain task.

Does changing engine horsepower and rpm actually do anything to the performance of the plane?

And the kicker. I can change the wing span on a plan, but not the fuselage length. Is it possible to do this?

Thanks for any ideas_bob

Or Not...