A few of us having been talking about getting together to play ArmA 2. One main problem about this is there are hundreds of mods/addons to use and things like that can get complicated when trying to party up. I wrote the quick guide on what addons/mods we need to play with each other. Hope this helps.
Before I get started you need to have the following: ArmA 2 Combined Forces (ArmA 2 merged with ArmA 2: Operation Arrow), BAF expansion, and the PMC expansion. Along with those expansions you need to have all your games updated to the latest patches (do not use beta patches).
For the mods we need, you must install the Six Updater. It’s a handy program that allows you to download mods and keep them up to date.
http://www.six-updater.net/p/download.html
Once you have Six Updater installed and configured, go to the mods tab and install the following mods:
@ACE
@ACEX
@ACEX_RU
@ACEX_SM
@ACEX_USNAVY
@CBA
@CBA_OA
@CBA_A2
@JSRS
@STHUD
After the mods are installed, go to your ArmA 2 folder and make sure the mods are there. After that, create a shortcut to your desktop of the arma2oa.exe program. Now go to the shortcut, right click it, click properties, and paste this into your target . As you can see we are not using @ACEX_SM. That is ACE 2’s sound mod. Instead, we are using @JSRS, which is a much more realistic sound mod.