I cant find the directory or the .rar How to Install
1) Download CBA_A3 (Community Base Addons for Arma 3) [Search Armaholic or Download Below]
2) Install CBA_A3 (Place the folder inside of your Arma 3 Directory)
3) Download MillerLite's Arma 3 Mod (Sorry for two rar files, couldn't do virus scan file was too big) [Download Below]
4) Place the folder inside the .rar inside of your Arma 3 DirectoryFOR STEAM VERSION
5) Go to Steam and Right click on Arma 3 Alpha and select 'Properties'
6) Click 'Set Launch Options'
7) Put this line into it and hit OK

8)You're Done (Move on to How to Use)

please message me back how to find it,