There out. Im not sure how long they have been but i just heard about it. Heres where you can go to download them
MLG Halo 3 Settings v5 Launch! | Major League Gaming
Theres also a new map. Ive only played it for half a game (I wasnt there at the start cause i was doing something) It looks pretty cool for the few mins i was there.
But i dont think they really changed anything else. They also have a blackout V5 so thats cool.