Hope to get a Load/Unload Feature

Recently I am making a vassal module about StarCraft,
within this module I need to realize the Load/Unload function for a unit like dropship or overlord,

I just wonder if there is possibility that you guys can add such a feature that:

when you right-click some piece(ex. dropship) and select the “load” option, right next to the piece will pop out a window
containing a small mini map, you can drag the units you want to put into this mini map (like some loading area),
and this map will always follow with the dropship, when you want to unload the units, you can still open the mini map
and drag the units back into the battleground (main map) and close the mini map.
:smiley: :smiley: :smiley: