I signed up on this forum just to thank you for that post. I have been trying to get dayz working for the last few days and have worked though so many errors. The last one being the bad serial one. So I went though so many sites and answers before I finally started poking around in the registry and found out that my key was showing all 00's in the armaoa folder so that told me that the key was not automatically inputted like the Arma2 folder. So then I finally, after many hours of searching, came across your brilliant post. Combined with what you wrote and the changer program it worked great and I am able to play. So I just wanted to say thank you for taking the time out to write that up and it worked great. I truly appreciate it. Thank you again.