Very interesting the concept of modular building ships like this. Certainly something to have a go at. ;-)
Forgive my ignorance, but am I correct in supposing you just start like creating any other ship with a core and pressing X to put it in the game and create a template of your choice?
EDIT: Oh well, that indeed seems the way to do it, the word template made me think there was more involved here. <g>
One wonders though what happens if the template contains more then a shop has in store block wise...
Greets,
Jan