-This works for legit ArmA II OA.
-You won't get banned for this.
Download ArmA II Reinforcements. You can easily find on torrent websites. DO NOT INSTALL IT!
Get Daemon Tools.
After installation, create a SCSI drive in Daemon Tools. ( Reboot is needed ) - (This will emulate a legit driver and a legit disc to bypass FADE).
Download the "ARMA 2: Reinforcements DLCs Setup Utility" ( I will link an attachment ).
Mount the big MDF file. ( It depends on which torrent you downloaded )
When it starts up type the following serial in - H5RV-C17HF-E2J5P-0ELHZ-YXERZ (Or any other generator key)
Install it in your ARMA II OA folder.
Run DayZ and both DLC should be installed now.