Skwasjer, I got the same screen as I had with the conning tower when I tried to save the .dat, I loaded the 18.dat, selected the 18 3d model, imported my hull, clicked save : it says a lot of stuff when I try to save my dat file. I uploaded a rar with the original 18.dat, the corrupted one, the hull. obj and the mtl file.
http://www.mediafire.com/?x3wh4mfzg15