The usage of the term "Kafer" is not to be construed as an infringement on any 2300AD copyrights, and is merely meant to be descriptive of the "aliens" featured here.
Unfortunately, I haven't been able to develop any deckplans for the Battleship cruiser yet. Besides, though "alien", ship design is ship design, although their base measure isn't the Standard Meter, but rather the standard Kafer meter. Thus, everything will be slightly wrong - the airlocks doesn't open and close normally, but "iris" open and closed, the lighting is too dim, and so on. Use the standard deckplans provided in the BR boxed set, but try to emphasize the "alienness".