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A tutorial on different ways to install the mod. (Will update from time to time)

Posted by Invasion1944 on Apr 17th, 2011
Basic Installers.

-Installer EXE-

1. Run the Invasion 1944 installer

2. Follow the on-screen prompts, when the installer asks point it to your ARMA 2 root directory e.g:

C:\Program Files\Bohemia Interactive\ArmA 2

All the mod folders (@I44, Missions, Keys etc) will be created automatically. Once completed close the installer.

3. If you have not already, install CBA
for ARMA2:CO you just need to copy the @CBA folder to your ARMA2 directory e.g:

C:\Program Files\Bohemia Interactive\ArmA 2\@CBA

4. Run ArmA2: Combined Operations.

5. From the main menu select 'Expansions'.

6. Left click '@CBA' and press the 'Enable' button

7. Left Click '@I44CO' and press the 'Enable' button

8. Click 'OK'

9. A warning message will come up that the game needs to restart. Click 'OK'.

10. The game should now return to your desktop, and automatically restart the game with the mod loaded. You should notice the Invasion 1944 Loading screen if loaded correctly.

Steam Users: As steam versions install to a different directory (and you may have separate versions e.g. DVD of ArmA2 but Steam version of Operation Arrowhead) you may want to visit the following topics on our public forums and the BIS public forums:

Post comment Comments
kileratlarge Apr 18 2011 says:

Love this ******* mod.

+6 votes     reply to comment
BlueSunsleader Apr 21 2011 says:


+2 votes     reply to comment
Hokipoki Apr 29 2011 says:

could you guys update the steam installion guide ? for some reason i cant get the freaking mod to work with my steam version of the arma 2 combined operations.

+4 votes     reply to comment
Invasion1944 Author
Invasion1944 May 26 2011 replied:

Try here:

+2 votes   reply to comment
SeanRamey Aug 14 2011 replied:

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

+7 votes     reply to comment
tommacool Sep 21 2012 replied:

Problem with your tutorial is that it is not correct. In my steamapps\common folder I have just Arma 2 Operation Arrowhead. And in that folder there are no folder just called Arma 2.
When I launch the game I have the option of launching Arrowhead or Combined Operations.
Where do I put the mod files? Damn confused

+1 vote     reply to comment
Invasion1944 Author
Invasion1944 Aug 14 2011 says:

Thanks Sean!

+3 votes   reply to comment
Rotfuchs Oct 3 2011 says:

it works. thank you

+1 vote     reply to comment
Invasion1944 Author
Invasion1944 Feb 26 2012 says:

For 2.6:

-7zip Archive-
1. Open the archive file
with 7-Zip (
2. Select the ‘Extract’ button.
3. In the ‘Copy To’ line paste your ARMA 2: Combined Operations root directory (where arma2oa.exe is located) e.g:
C:\Program Files\Bohemia Interactive\ArmA 2
4. Click ‘OK’ to start extracting the contents. Once extracted you can close 7zip
-Loading Instructions-
From your your ARMA 2: Combined Operations root directory run either:

-Executable Loaders (Windows Vista/7 ONLY)-
WARNING: use at your own risk; it may cause a BSOD with certain antivirus software
Invasion 44.exe - Automatically loads ArmA2:CO + CBA + I44
Invasion 44 Beta.exe - Automatically loads ArmA2:CO Beta + CBA + I44
(Note: you may make shortcuts to these files with your own additional startup parameters)

+2 votes   reply to comment
001kito Jun 5 2012 says:

I have Arma 2 DVD and OA on Steam. When I click the Invasion installer it says System could not find armaoa.exe. I have all the patches and no other mods. I downloaded everything from here but I find the topics where they explait the installation a bit messy

+1 vote     reply to comment
CarpeDiem Oct 18 2012 says:

how do i uninstall. I have enjoyed very much however i need to delete as its my brothers computer and i feel bad taking up so much memory. help please?

+1 vote     reply to comment
malmborgaj Nov 5 2012 says:

I'm very confused by this, I have downloaded it for the third time now and it still wont let me load it on. It keeps saying that the files are not found, also its saying that the CBA file is not found even though I activated it on the game. I have the latest version of the game and everything Please someone help!!!

+1 vote     reply to comment
valipinot Jun 21 2013 says:

The mod take 2 hours to download the files but looks ok in game :D
Nice mod

+1 vote     reply to comment
marines6222 Jun 26 2013 says:

i tried to install this and i keep getting errors can someone please help?

+1 vote     reply to comment
kaxxari Oct 15 2013 says:

the gamefront link dont work

+1 vote     reply to comment
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