Thanks for the answers.
I developed my own method. It may not be perfect but it works with me.
I open the
ship's .dat file and then I import the
guns_UK.dat file.
Then I manually put the guns in the right place and take a screenshot. Unfortunately the
guns_UK.dat file only have one 4,7 inch gun, but the ship needs four.
So to solve this problem I select the 4,7 inch gun, choose "Show only selected object" option and take one screenshot of the gun. With the Photoshop I duplicate this image 3 times and join all screenshots in the ship layer.
The result of the first test.
(Sorry my bad english)