It worked once but when I restarted the game it doesn't show any flags, on castles and lords. Errors showed up about the
resources. All files is placed in where should it be and modified these lines. I play on Diplomacy 4.3, I haven't tried it on native
#load_resource = banners
#load_resource = map_flags
#load_resource = map_flags_b
#load_resource = map_flags_c
#load_resource = map_flags_d