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I know that if you put in the origional xbox disc you cannot use the guide button, but what if you install the game?Edit: I ment download the 1,200 mp game[Edited on 11.04.2010 4:25 AM PDT]
-K
No, You can't. I don't know from direct experience with Halo Combat Evolved, But I bought Grand Theft Auto: San Andreas and I wasn't able to use the Guide. So I'm guessing you can't in Halo either.