Would anyone be so kind as to walk me through how to implement it? It's from a mod (The SSD mod, which basically just adds a couple of SSDs - that's it really) - when I'm done, I'll post a few screenshots and you guys can see what it looks like. I'm assuming it's not that complex a process to simply add one ship.
Not really. If it's not broke, don't try n' fix it. There'd be no point in the New Republic passing over an extremely successful & useful ship purely because of its name and previous portfolio (for want of a better word) - I know they used captured ones, but I have no idea if any others were actually constructed from scratch, post-Empire.