
Originally Posted by
kylania
The map you played will be a PBO in the following folder by default:
C:\Documents and Settings\<windowsusername>\Local Settings\Application Data\ArmA 2\MPMissionsCache
Copy that file out and unPBO it with your favorite PBO tool, then move the folder it creates to your missions editor folder, by default:
\My Documents\ArmA 2 Other Profiles\<ArmA2playername>\missions
Then you can edit it in the Editor. When you're done just Save -> Export to Multiplayer missions and it'll will have created a PBO in your ArmA2\MPMissions folder you can host yourself.