Gamestop has no good deals for Reach beyond the convoluted trade in set up and that pre order bonus for an extra armor permutation. I'm interested in the latter, but what I'm wondering is, does that code work only once or can it be used multiple times? Back when I preordered Far Cry 2, I told a friend of mine the code for that and it worked just fine for him. Has the same been true of other Gamestop exclusive DLC?