Before you dive right in to ship modeling, get yourself a 3d Modelling program (3ds Max, Maya (these are expensive) or Wings3d or Gmax (freeware)) and find some interactive tutorials to go with the program of your choice. Try these tut's first to give you an idea of what is involved (I remember the first one I did....create a celtic knife).
What you ask is not easy to explain unless you have the background knowledge of 3d modelling.
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