Make a mod folder, name it @ka50 , Open that folder, while inside this fold make a folder named Addons , Download the .rar files and manually copy & paste them into the folder ,following that make a ARMA 2 shortcut on your desktop, right click, go to target make it say this "C:\Program Files\Bohemia Interactive\ArmA 2\arma2.exe" -mod=@ka50 -nosplash . or what ever your path is to your arma folder....Remember: you should always have a @mod folder , and inside that mod folder there ALWAYS has to be a folder named " Addons " otherwise the @mod command start-up will not detect any "addons"