Rhino Mini Tutorial.

In Rhino I go to "View/Background Bitmap/Place" and I pick the blueprint and place it in one of the viewports.
Fig. 1

Then I draw it up with curves, and place the top, side, front and back drawings in each of it owns layers.
Fig. 2

You can see a closeup of the side view.
Fig. 3

I then rotate the prints so they "fit" in each of the viewports. No you just have to model the rest (The fun part).
Fig. 4