Works if they don't own a vehicle.
1. Place a group of 3 or so units (AI leader).
2. Place a manned helicopter 50-100m away (in its own separate group).
3. Give the helicopter a "Load" waypoint right next to it.
4. Give the group a "Get In" waypoint near the helicopter (Not on it).
5. Synch (F5) the "Load" and "Get In" waypoints.
6. Preview. Notice how the group runs to the helicopter, then proceeds to board it.
Now try again, but this time, have them be in another vehicle before trying to board the helicopter.
1. Place a group of 3 or so units (AI leader).
2. Place a manned helicopter 50-100m away (in its own separate group).
3. Give the helicopter a "Load" waypoint right next to it.
5. Place any vehicle near the group.
6. Give the group a waypoint to enter that vehicle.
7. Give them a "Get out" waypoint.
4. Give the group a "Get In" waypoint near the helicopter (Not on it).
5. Synch (F5) the "Load" and "Get In" waypoints.
6. Preview. Notice how the group runs to the helicopter, but this time goes back and boards the vehicle they were first in.