Where can i find codes to additives to Dragon Age Origins Digital Deluxe Edition?

Check the directory structure of the game and look for a directory labelled Bonus from what I remember the codes or the content should be there.  IF it is a code then you should redeem that code in Origin, if the Code doesn't work there then you may need to visit the code redemtion page on the Bioware Social Network as that is were we had to redeem them before Origin was created.