Help with a couple of Xbox games

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So, I travel to America with $160 to spend on whatever I like. So what should I get? More games, of course. But when I get a couple of Xbox games, Fifa world cup 2010 for my brother and Dragon Ball: Raging Blast for me, but the American discs don't work on an English Xbox. Since I cant get a refund from a shop we dont even have here, I think I need a way to be able to play them on the console. Does anybody know a way to play foreign games on my Xbox?

Thanks in advance