I am going to assume you are on the 360 due to your signature. Hit your home button. (The big glowing X on your controller) Scroll left twice, and go down to redeem code. Input your code and it will likely start a download. Have fun!
I just tried to redeem but the website does'nt work after step 4 it says login then whe nI do it goes back to step 3 lol. I got another code in my hardened edition but it say invalid code when i put it in playstation store ! Is it to early to redeem the package?