you need to buy arma2 combined operations (this is basically a pack containing arma 2 and the arma2 co expansion operation arrowhead)
then download the free dayz mod, preferably using dayz commander or sixlauncher, these two little programs are there to automatically update and manage your dayz mod wich is pretty damn useful cause manual installation is a bitch ....
anyways, all info can be found on the dayz website and forums, take a look over there if you're having trouble with somthing !
				
			then download the free dayz mod, preferably using dayz commander or sixlauncher, these two little programs are there to automatically update and manage your dayz mod wich is pretty damn useful cause manual installation is a bitch ....
anyways, all info can be found on the dayz website and forums, take a look over there if you're having trouble with somthing !