Stuck in The Lord of the Rings - Return of the King X-box game

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Has anyone out there ever finished The Return of the King for x-box? I was playing this game a few years ago, but then I got stuck at the part where Aragorn, Legolas, and Gimli are travelling through the Path of the Dead and I can't get out. It is so hard even when you play as two players. Please help if you have actually beaten this level.