n the back of the Hardened edition it says it comes with 2 playercards and a weapon camo. Where are those codes? Also where would I put them in?

When you download The patch you Will get the camo in The game.

If your on ps3 you click at redeem codes in The PSN store

I'm pretty sure from the trailer there are challenge coins inside of the box. And etched on them are all of the dlc codes on it.

For PS3:

To get Nuketown 2025, Nuketown Zombies and the XMB themes, look for the piece of paper inside the game's case that has the code on it and redeem on the PSN store.

To get the Playercards, Camos & Soundtrack, enter the code found on the challenge coins on:

profile.callofduty.com/blackops2ce/login

for me there was a piece of paper where the game manual would go in the steel game case that had the codes for nuketown 2025, nuketown zombies and some avatar stuff for xbox live avatar. also on one of the challenge tokens there is a code that you enter on COD elite which gives you access to soundtrack and camos/playercards