This took me a while to figure out too, but here's what you do.
1. (assuming you start with no mods installed, as if you just downloaded it with steam) You copy/paste all the files in your "steamapps/common/arma 2" directory, into your "steamapps/common/arma 2 operation arrowhead" directory. (this way you have the original arma 2 files still in the original directory as backup)
2. Put your mod files into the "steamapps/common/arma 2 operation arrowhead" directory, just like you had them, only in Operation Arrowhead.
3. Your pretty much done now, so start Operation Arrowhead up (NOT COMBINED OPS) and when you get to the main menu, go to expansions, then select your mods (@I44CO, @CBA, ALSO CHECK ARMA 2). Then the game will restart, running the mods, and will continue to run the mods at startup until you change the expansions list again.
You can also edit the steam properties for Operation Arrowhead to run the mods at startup if you like, but I didn't tell the steps to do that because I explained a simpler way to do the same thing. There are other things that can be done with the steam game properties; however, such as, getting rid of the startup logos.
Anyways I hope this helped and that you will have no more problems, if you do; however, just say so. :)
I have now said this 3 times on this mod's comment areas, so people should not have too much trouble now :D
SeanRamey
Sean joined
This member has provided no bio about themself...