in an .sqf file try the following:
_vehiicle = _this select 0;
_crew= crew _vehicle;
_pos= _vehicle modeltoworld [1,3,0];
{_x setpos _pos} foreach _crew;
Put Exit.sqf in the folder of your mission.
Call it in a trigger using:
[vehicle] execvm "exit.sqf";
replacing "vehicle" with the vehicle of your choosing.
Luke