In unders stress , i just bought the Arma 2 and Arma 2 OA on steam 9 days ago seen then in researching for a solution to my problen that is the 'dayz_code' requires addon 'CAbuildingparts' and the bin\config.bin/CfgVehicles/Citizen1.scope and many more as bin\config.bin/Cfgweapons... Yes i have follow the GUIDE - steam instalation (i recheck several times sense im out of options ) tried to add "-mod=@Dayz -nosplash" on steam (Operation Arrowhead > Set launch options), have tried rename the arma2oa.exe(follow all steps here.:http://dayzmod.com/forum/showthread.php?tid=13684) and nothing, have reinstall at least 3 times both games, and several things that in cant even remenber quite right. So for now in stuck. I dont know if this information helps but when i try to connect the game starts and i just can see a endless area withought trees , buildings , grass and etc. By god someone help me ! Thanks for your time.