My problem is, I'd love to create separate components that I could then drag over and attach to the main component. Think the complexity of a motorcycles engine! Is it possible to do that? I have not yet tried it, having crashed and burned the first time (two years ago) I even thought of the idea . . .

Conversely, are there any 3D models of motorcycles I could borrow and modify to give me what I need: decent 6-view renderings of the basic machine -- chassis, engine, wheels/tires, etc.?