nice idea, vyper
how about this (can even be done by the mission designer):
give the leader of the cargo or (better) the pilot an action like "Initialize Flare Insertion" or something like that.
this action activates a script, which checks height and speed of the mh6.
now lets say the mh6 is approaching the LZ with 25kmh, descending to ground level.
as soon as height <2, each guy on the planks gets kicked out in an radom timeframe (something from 0.3 - 1 seconds).
conditions in the script could check if the insertion was already done, otherwise the action would abort if the mh6 has a certain speed and/ or height.
iÂ'd like to give it a try, but iÂ'm only basic skilled in scripting