I don't have time to check the ship myself. Have you created an entry for it in "Ships_init.c"? As a starting point, you could copy the entire existing entry for "Brig1" and simply change the "refShip.Name" line to "Piratbrig01". You should then be able to choose the ship by starting a FreePlay game and clicking the ship picture on the right of the story selection screen. There won't be a picture of the ship, just a blank square, because you don't have an interface picture for it. You can only get that by selecting the blank ship, going to sea, and getting a screenshot. You can then make the interface picture out of that screenshot.