Copy these files into the directory where you installed Rebellian there is a directory GData, copy in it.
ex:
c:\program files\LucasArts\Star Wars Rebellion\GData

This will enable you to make Correlion Corvette, Nebulon B Frigate, Xwing, Y Wing, A Wings build in 4 days.
And make your craft almost invincible.

The same things will be awaible for Rebels soon.

ENJOY IT.