I think the problem could be connected to Afterworld being very scenario specific. I think they blocked the pedia completely out of the scenario, so they had less things to bother.
I am not sure if it can be played on a random map at all. If so, one needs a really good mapscript, which sets walls and doors for some buildings. And places several units.
So, I think creating a Map / Scenario to start with is best.
A scenario where you will play the 7th Company and will have a given amount of troops (i would also like you to be able to "rescue" more units, when you find them on the map they will join your cause).
We will need several units for the 7th Company (if you wanna add them, i can do the art defines afterwards):
"Grunt" Units:
Recon (mp5, backpack): move 6, strength 5, icombatlimit: 50, airrange 2, iaircombatlimit: 50, field of view (fov):7
Gunman (ak47/famas/m16, helmet): move 4, strength 7, icombatlimit: 150, airrange 3, iaircombatlimit: 80, field of view (fov):4
Machinegunner (Machinegun, helmet): move 2, strength 6, icombatlimit: 100, airrange 4, iaircombatlimit: 140, field of view: 5
"Hero" Units:
Sev(Double Uzi, close combat) move 5, strength 8, icombatlimit: 100, airrange 2, iaircombatlimit: 50, field of view (fov):5, firststrikechances:2
Jal(Pumpgun, close combat, Engineer) move 4, strength 9, icombatlimit: 200, airrange 1, iaircombatlimit: 300, field of view (fov):5 firststrikechances:1
Atticus (Sniper rifle, far ranged) move 3, strength 6, icombatlimit: 50, airrange 6, iaircombatlimit: 200, field of view (fov):7
Ragah(Rocketlauncher, Mines, MP, Destruction) move 3, strength 7, icombatlimit: 100, airrange 2, iaircombatlimit: 50, field of view (fov):5 (should have something like 5 "Nukes" setting fire (fallout?, making a plot unpassable or at least damaging) on the place they hit, nukes should be able to be fired 4 fields wide and destroy everything on that field)
Riest (MP5,Medkit Medic) move 5, strength 6, icombatlimit: 70, airrange 2, iaircombatlimit: 70, field of view (fov):5