When you do copy of EVERYTHING is copied from the other actor, so you don't need to list all of that, and I'm pretty sure units come for free when they're added into the inventory.
Go to Activities.ini and copy the part where it says 
Code:
AddInventory = AHuman
CopyOf = *Whatever*
down to
Code:
AddInventory = TDExplosive
CopyOf = *Whatever*
and paste it under the code for a craft.