Halo Easter Egg - Hidden Message!

Go to a multiplayer on timberland with at least 1 ghost. Go to red base. Go out of red base and look to your right. On the mountain, There is a little corner you can stand in front of in the litten area not shadowy. Once you are in the right spot have sumone ram u with a ghost, now you are in the backround area. Look twords the trees and go forward all the way to the invisible wall. Turn left then go forward. Keep going forward until you get to the corner. There will be black wrighting on the grass. It says DMM 2003.I think it means Dull Microsoft Managment. I only have the computer version so i dont know if its on the x box version