I thought you might be interested in looking at Run ArmA 2 OA separate from ArmA 2, or remove all ArmA 2 content from a mission..
https://forums.bohemia.net/forums/topic/136987-run-arma-2-oa-separate-from-arma-2-or-remove-all-arma-2-content-from-a-mission/?do=findComment&comment=2231373
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