Ah, this reminds me of my time when I played Quake 2 over the net. There were many fun things to do, including making a model and skin of a regular box (which would be downloaded onto their computer automatically). I can still hear it now... "OMFG THE WALL JUST RAILED ME!" Now that made for some very fun games.
But as to this mod, I can see it growing very old, very quickly. I also see why it died, beacause after playing NS for so long, I have memorized just about every inch of the maps, and once you do that in Box wars, its just a matter of shooting the box that doesn't belong. It is too bad that it does not work, because it would have at least been fun for a bit.