Hmm, maybe you should think about using the Gastraphetes. If you can model-edit the Gastraphetes, you could then remove that weird hat of him. And if you know hex-editing, you could replace the crossbow with something that looks like a machinegun, by modifying the texture.
At least that's what I'd do, since I was making a Star Wars mod a while ago, and I used it for the clone troopers.
Hope it helps!
STAR WARS
EMERGENCE OF DARKNESS
MODPACK
=================