That would be great, Narf. Cheers.
JLS- I'm a little confused about the sails. Would a ship require one of each type of sail? I suppose you could restrict each sail type to "one per vehicle", with the mainsail perhaps being the most important (most movement) and the others perhaps adding one movement (or combat movement) each. I was against this, originally, since it seemed to overcomplicate the matter, but the more I think about it the more I'm liking it.
The Salt Water Displacement factor can just be added into the vehiclesizes.txt - I'd imagine a negative "Movement Bonus" ability would work for the larger ships, though I'm not sure if it will work. I'll go test it.