Extract the 'missions_ew.pbo' and the 'missions_ew.pbo.bi.bisign' from the hotfix zip file.
Replace the existing copies in the game 'Addons' folder with these new copies.
The OFPEC Command Reference contains details of all scripting commands available to the editor.
All you need to know about how to start editing.
This tutorial explains the mysteries of multiplayer editing.
OFPEC hosts several quality tutorials written specifically for the site by staff and members...
Register a tag, browse for addon keys...