Sorry, I still have a doubt.. May be because I never tried this
FG in this case = SFG Material + Pkg Materials...
Prod Version = BOM + Routing for a given material No..
So, when you create 4 Prod versions for FG in this case (one for each supplying plant of SFG) --> You should have 4 different BOMs of FG in this case... Do you have the option to specify the SFG Material + Supplying Plant in the BOM of FG?
br. Ajay M