Here is a fast fix for you.
Go into the FEDERATION race folder and swap the names for the Juggernought and Dreadnought images. There are two each:
Federation_Portrait_Juggernought
Federation_Mini_Juggernought
Swap with
Federation_Portrait_Dreadnought
Federation_Mini_Dreadnought
This will have no effect on your game, and none on PBW except that others will see your ships as they were originally unless they make the swap as well.
I like the Galaxy X and it is a favorate among many Star Trek fans. I will fight to keep it in the mod.