to add ships to the defaults is easy.
1. copy the line of the ship thats close to what u want in the default core.
2.then right below it paste it and rename to the ship folder and ship u r adding, and say if its like a frigate add a number to it like frigate2.
3. then do the same for the defaultloaud out.
heres a small example
frigate saber
frigate2 trebaunt
frigate3 kampela
and so forth.