He means put the script whatever in to your mission folder!
the mission your working on, then dont forget to call it...
_nul = player execVM "callammodrop.sqf";
Goes in the init of the unit. Then you need the script "callammodrop.sqf" in the mission
folder which is saved in your "My Docs >> ArmA 2 >> Missions >> Your_mission_name
Inside your mission folder should have another folder called "scripts". The callammodrop.sqf
should be inside that. If not then remove the "scripts" from the path of your init.sqf
its like this how Dead3yez
You can change it to this:
All this makes sense? lol...