Go into a normal match and set it to two players. Press Start, then turn two players off. Go down after Big Show, and you should see Big Show 2003. You can now play as him without having to unlock him normally. When you are going to play an exhibition, before you select your wrestlers choose where it read "Player One" (or your profile name) and switch it to "CPU". Advance to pick your wrestler and press B. Then, switch CPU to "Player One" (or your profile name) and advance to the pick your wrestler screen. Go one past Big Show and you will see Big Show 2003 version.