I went to his forum and was PM'ing him, im waiting on his reply now. And, only some graphics are his, we made heaps!! And we even re-made some. Only the original enemies/MC/backgrounds were made by him. We've made all the new enemies/weapons/animations for reloading/melee, more weapons, grenades and we've got heaps more features that halo zero doesn't have. I played the demo of Halo Zero 2 the other day, and i was shocked! It doesn't even have mouse control, you can only shoot at 2 levels. The level for when you're standing, and the level for when you're ducking. We even have custimizable MC with helmet changing ect. But to answer your question, i have talked to him about it, im just waiting on a reply from him.
Scotty