or alternatively you could use a basic template for the ships like:
[Zone
nickname = Zone_SO01_pop_ambient_01 ;anything here
pos = 0, 0, 0 ;center of system
shape = SPHERE ;round thing
size = 150000 ;150k from middle?
visit = 128 ;leave
interference = 0.500000 ;dunno
sort = 99.500000 ;works fine
toughness = 4
density = 6
repop_time = 25
max_battle_size = 12
pop_type = Background
relief_time = 15
faction_weight = so_grp, 20
encounter = area_assault, 4, 1.000000
faction = so_grp, 1.000000 ;your faction, all must total <= 1
encounter = area_defend, 12, 1.000000
faction = so_grp, 1.000000 ;your faction, all must total <= 1
if you copy and paste that adding more of theese:
encounter = area_defend, 12, 1.000000
faction = so_grp, 1.000000
to the bottom with your own faction you will ventually get an uberwarzone!
just put at bottom of your system file (/DATA/UNIVERCE/xx01/xx01.ini)