Thanks guys, for this one I'm just using Ndo2 for the sake of speed. I baked AO then used Ndo2 to create the normals and bake the Ao and cavity maps. It's in unity right now just using the default Diffuse and Normal shader. Right now the thrusters are just 2 pieces of geo with transparent textures on them.
Small update for this Wednesday! Alien Craft asset pack is live on the asset store. Might have some tweaks to it in the future, but for now I'm really happy with them. I also started some Environment turrets for the game/asset pack. Currently working through the textures atm. Flat/Diffuse only. C and C welcome!