Just some fiddling around changing a few parameters. Just a test. Drop txt file in the following directory assuming default install:
C:\Program Files (x86)\Gratuitous Space Battles 2\data\scenarios
Check your Galactic Battle Mode and the new scenario is there at the end of the warp line.
For some reason I can’t upload the file. So create a new text file in the above address and copy the following into it:
[config]
name = scen11
guiname = Elysium Prime
mapsizex = 4096
mapsizey = 4096
player_deployment = 10,100,1000,3996
ai_deployment = 3000,100,4056,3996
starfield = 1
fleetcostlimit = 250000
pilotlimit = 800
enemyrace = yootan
size = large
unlocked_after = scen10
mapx = 2000.0
mapy = 700.0
mapicon = Planet03.dds
iconsize = 100
default_ship_angle = 90
asteroidtype = FIELD
asteroidcount = 140
bloom = 0.7389
foreground_light = 0.3278
background_light = 0.7056
light_angle = 266.0000
[variables]
[terrain]
0 = PLANET,0.82,0.49,0.10,Planet10.dds,213.00,0.00,0.00,1.00,1.00,0.24,0.24
1 = NEBULA,0.58,0.46,0.10,nebula7.jpg,285.00,0.00,0.00,1.00,1.00,1.57,1.57
2 = STAR,-655.00,600.00,36.00
SAve the file.