1.) Go into the folder: C:\Program Files\Codemasters\OperationFlashpoint\Users\(user name)\Saved\campaigns\1985 and make sure all the autosave.fps, continue.fps and save.fps files are removed (of course one should probably back these up).
 
2.) Go into the folder: C:\Program Files\Codemasters\OperationFlashpoint\Users\(user name)\Saved\campaigns\1985\missions and remove all the folders within. 
 
3.) Take the contents of the enclosed .zip file and place it in the folder: C:\Program Files\Codemasters\OperationFlashpoint\Users\(user name)\Saved\Tmp, replacing the older file there. 
 
4.) Now when you play the game, all missions will be unlocked. When you play the games, you will be able to replay all missions, or revert back to a previous one and continue from that point on.
 
 
Markham Butler