I think it was the guys from the website that done it, and it does look good, the textures and the model are really great.
However, there is somthing that should be changed, it seems like you can't fire to the front only upwards, so if you see an enemy squad in front of you, you just can't shoot them, it's ok if the main cannon can't but the Machine Gun should be able to do it.
Also as a gunner, you can turn out, which is great since it gives you a much better view for using the Machine Gun, but you can't fire it, when turned out :-\
With this cpp issues fixed, I think this addon would be twice as good, since it does have great textures, and a great model.