If you have the "WRONG CD KEY" error, just follow the steps above (MADE BY DIRTFOX).
1-Start -> Run -> regedit -> go to HKEY_LOCAL_MACHINE\SOFTWARE\Bohemia Interactive Studio\ArmA 2 -> rename the "KEY" registry to "KEY_OLD".
2-Right-click on the white space -> New -> Binary Value -> rename to "KEY" and let it null. dont close the regedit yet.
3-install the patch 1.02. it can take several minutes.
4-when its done, go back to registry. Rename the "KEY" (null) to "KEY_NULL" or something else, and rename the old "KEY_OLD" to "KEY" again. Now you can close the regedit (:
But for me it didnt work but I found solution for my case (Vista 64)
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Bohemia Interactive Studio\ArmA 2
and now make that 4 steps
NODVD is on gamecopyworld
Armed Assault 2 
