it works fine for non steam versions you just cant use the play button. awesome work my man. +1 for you @NekoSteamBoy do something like this: follow all instructions to what they say other than the changes listed below. (FYI I bought mine on amazon.com while it was 14.99 for the ARMA II: CO) Process for non-steam version. The updater settings should be changed so that ARMA II Folder: C:\Program files\Bohemia Interactive\ArmA 2\ exactly as above. Leave the download URL alone. dont change that. Create a brand new shortcut on your desktop. put this as your target path: "C:\Program Files\Bohemia Interactive\ArmA 2\arma2OA.exe" -noSplash -mod=@dayz exactly as above. Name it something like DAYZ Mod