Or:
Make a ship (and texture it) in Art of Illusion (free,
www.artofillusion.org).
Export directly to .X using my .X exporter plugin (
http://kolis.dyndns.org/ed/prog/exportX/exportX-1.1.zip)
Note that if you use procedural 3D textures, the model won't look all that great (you will have lots of ugly seams)... I'll have to work on fixing that!
