I pre-purchased my game from Steam, and I need help, how do I get all the things that came with the LE bundle, it gave me 2 codes, one said "LE Bundle", the other said something like "Limited Edition", WHAT DO I DO WITH THESE CODES? Someone please help me!

Press your xbox 360 guide button (big X in the top middle of controller). Scroll to the left using the left bumper or left d-pad or tilt left joystick to the left, and look foe an option that says "Redeem Code" and type in your code(s). Note: I think you go to the left all the way untill you see the option "Redeem Code".
Hope this helps!!!