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Posts: 2872

Level: Member

Country: cn
Location: PRC
Age: 39
In-game name: DarkXess

#88322 Posted at 2010-08-15 03:42        
This whole post and thread is deprecated since ARMA 2: OA 1.60 release (automatic detection of A2 install
(A2 needs to be started once incase of STEAM/Desura)
it still can be used as workaround in case of some issues ...

This TUT was made by Dwarden from BIS Forums!
The Original Post is here!

Place content of this file into same directory where is ARMA2OA.EXE

note: this is only for these who have A2 and OA directories standalone


Warning: will work ONLY IF there are EXISTING OR CORRECT paths in windows registry to both titles
(e.g. both A2 and OA must be run at least once on STEAM prior using the script)

*** then re-validate game file cache and run ARMA 2 prior running A2:
Combined Operations via menu option provided by STEAM ***
*** It seems some low user rights running DVD setup also are missing the proper registry entries for PATH ***

STEAM users;
latest version of batch is now part of STEAM release , please re-validate cache

non-STEAM users:
use _runA2CO_nonSteamOA.cmd from

in case it don't work please check registry for following entries (only if You know how)

HKEY_LOCAL_MACHINE\SOFTWARE\Bohemia Interactive Studio\ArmA 2
key MAIN must contain correct path to ARMA 2
HKEY_LOCAL_MACHINE\Wow6432Node\SOFTWARE\Bohemia Interactive Studio\ArmA 2
key MAIN must contain correct path to ARMA 2

HKEY_LOCAL_MACHINE\SOFTWARE\Bohemia Interactive Studio\ArmA 2 OA
HKEY_LOCAL_MACHINE\Wow6432Node\SOFTWARE\Bohemia Interactive Studio\ArmA 2 OA
key MAIN must contain correct path to ARMA 2:OA

************* FULLY MANUAL WAY for experienced PC users *************

for ARMA 2: Combined Operations
solution to enable ingameUI modification manager
(when -mod are used the modification manager is disabled)
Windows Seven, Vista users using inbuilt mklink

mklink /j ".\Addons" "..\ARMA 2\Addons"
mklink /j ".\Dta" "..\ARMA 2\Dta"
mklink /j ".\Keys" "..\ARMA 2\Keys"
mklink /j ".\userconfig" "..\ARMA 2\userconfig"

Windows XP users with NTFS drives needs use this from SysInternals

junction  ".\Addons" "..\ARMA 2\Addons"
junction  ".\Dta" "..\ARMA 2\Dta"
junction  ".\Keys" "..\ARMA 2\Keys"
junction  ".\userconfig" "..\ARMA 2\userconfig"

this will automatically enable your game to load ARMA 2 content w/o need to use -mod switch
now you can add / remove mods in the UI interface
there are 3 problematic

1. you cannot enable/disable ARMA 2 off the list and it looks disabled
* yet it works, so no issue

2. all servers with retail A2:CO will show as Red with question mark
* yet You can join and play, yet it works so no issue
+ there is 1 downside of this

3.if you host you will be shown as w/o the CA and thus A2:CO users can't play with You
* can't be resolved w/o data wise changes, no big issue if you not hosting

------- contains _runA2CO_beta.cmd
it does the same as _runA2CO.cmd for beta build of OA
only limitation is, it needs to be placed into same directory where is ARMA2OA.EXE
so you need add shortcut to it or something along the line


scripts are within attached
they detects automatically your A2 and A2:OA and do these changes for You
also i included the one where you can easily add junction for mods from ARMA 2 to OA folder to be seen in ingameUI modification manager

NOTE: \Keys\ folder is already present in \ARMA 2 Operation Arrowhead\
so in case You need to host games, please copy your keys over or rename the
OA keys folder and create junction afterward to A2 one


Manual installation creating Arma 2: Combined Operations
Step 1: Uninstall ArmA2 and OA. Make Backups of your Modfolders.
Step 2: Install ArmA2 and run it once.
Step 3: Install OA. When asked where to install to, install it into the same folder as ArmA2.
Step 4: Install BAF (if applicable)
Step 5: Install PMC (if applicable)
Step 6: Install the latest OA Patch (patches also A2 + BAF + PMC).

Sample for Step 3:
If you have installed ArmA2 in c:\games\arma2, then you must install OA into c:\games\arma2 as well and not in c:\games\oa!

Attached Files

This post was edited by Foxhound (2012-04-19 15:15, ago)

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