Art of Cheating - Codex versions is a mod for the Dragon Age: Origins. The first version is very simple, it's a cut-and-paste of the code. In the future, more content and formatting will be added.

You can install this mod by downloading it and extracting the included "override" folder into the following directory:

Documents/Bioware/Dragon Age/Packages/Core

If you want to uninstall it, simply delete the file under:

Documents/Bioware/Dragon Age/Packages/Core/override/plt_cod_bks_art_of_cheating.plo

This AddIn is completely self-contained, and should work fine with both the base game and any other AddIns or Mods.