If I use ftech for nacelle swapping, the deflector is also on the same texture.  Since I have never used ftech for such a thing, I might need some help.  I like the idea of the nacelles glowing blue in-warp, but the deflector will just be a button- turning it on an off by the players choice.
On a side note, if I do a constitution pack, what ships will I need to make it canon?  Also, if every ship looks the same, I think that there should be some minor changes between them, so you will have a greater chance of playing all of them, and not just a few.  This includes added saucer/secondary hull cargo hatches, battle damage, rust?, etc.