adding ships to GWX

[pluskat]

How do I add new ships to in to the game I know how to do
it Via the mission editor Ive put in Italian ships and all of vondos
ships as well but they never show up in a campaign do I just copy
the files into the relevant places as I have done before and wait
for them to show up,or do I have to merge them some how in
to the campaign file.

any help appreciated