Here is a link to a PDF of the Billings African Queen Plans. It is not accurate and shows how to build it as it looks today. The boiler is all wrong. I would build it with electric motor with a dummy boiler like in the movie, perhaps with sound effects and a smoke genrator like model train engines. Look at my Gallery and read the details for info to transform the Billings model.
http://www.billingboats.com/instruct...nstruction.pdf