Hi,
I bought X edition on steam and install a2+a2oa+baf+pmc+acrlite+beta 108074 with running the app after every stage. I saw all in expansion list in game and I have utes and chernarus maps in editor so I think steam correctly integrated a2 with a2oa.
But still I miss the "Launch A2 CO" option in steam only "play a2OA" and "launch in windowed mode" options. Is it normal?!
The second problem is when I use -mod parameter in desktop shortcut or launch options in steam I lost a2+a2OA integration. Game started as AO + BAF+PMC + beta + CA(?) + @mod. I was try different mods the problem is same. When I deleted -mod parameter the game runs perfect.
http://forums.bistudio.com/showthread.php?101214-ARMA-2-CO-(how-to-combine-ARMA-2-into-ARMA-2-OA-and-use-together)&p=2561837&viewfull=1#post2561837 - I think he has the same problem