Open Six updater and select @ACRE from the Mods tab, then hit Add Selected; You will notice to the left side you will have two additional items under your ACE selections as below.
From here Click on the Action menu and make sure install or update is selected, then press Run ‘Install or Update’, from this point the messagebox below the mods window will start downloading ACRE and JayArma2Lib and install. They will appear green in the menu when up to date.
Copy the acre.dll (or acre_x64.dll) from C:\Program Files (x86)\Steam\steamapps\common\arma 2 operation arrowhead\@ACRE\ts3 plugin ; into your teamspeak plugins folder located in C:\Program Files (x86)\TeamSpeak 3 Client\plugins
In teamspeak Click Settings then Plugins and make sure your ACRE Plugin is selected as below:
If so continue on.
Arma 2 Configuration
Go to C:\Program Files (x86)\Steam\steamapps\common\arma 2 operation arrowhead\@JayArma2Lib and copy dsound.dll into this folder C:\Program Files (x86)\Steam\steamapps\common\arma 2 operation arrowhead
Copy your existing Arma 2 ACE Shortcut and paste a new copy, name it so you know its the ACRE version and make sure you have the following string as your launch string: