Quite a simple system, but solves the problem of not having a clue who gets in or out of your vehicle. Receive text notifications whenever another player enters or leaves your vehicle.
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...
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