Tutoria Video: https://www.youtube.com/watch?v=GmZBfrI ... e=youtu.be
Only for Survivors with non-steam version:
If you have a non steam version of arma 2 you need to go to steam and click on "Add a game" and then
select "Activate in steam". Read the license agreement and select "I agree". Enter your CD-Key and click "Next".
Select the installation directory and then double click again.
Wait until Arma has successfully installed.
For all Survivors:
(For those who have Arma 2 OA installed on steam.)
Cick with the right mouse button on arma 2 oa and choose "Properties".
Next click on "Beta" and install "beta". Go to the "General" tab and click on "Set Launch Options".
Insert the startup parameters "-mod=EXPANSION;@DayzOrigins" -nosplash -world=empty -nopause.
Close the preferences window.
Next go to the Arma 2 folder (non steam version) and copy the "Addons" folder.
Go to the Arma 2 OA folder ("steam" - "steamapps" - "common" - "Arma 2 Operation Arrowhead") and paste the copied
folder into Arma 2 OA folder. DayZ Origins must be in the Arma 2 OA folder too.
That's it, now you can play OriginsMod on the steam version of Arma 2 OA.
If you still have problems go to Technical Support forum