You have that gib in same mod? Otherwise you have to copy it elsewhere...

It's all in there, I've looked at it and I have no idea why it won't work.

Ok, TrouserDemon, I haven't tried Mushroom Head's method, but here's how I add actors to the activities ...
Copy all the lines below "DataModule" in a mod's Index.ini . In the case of Maxi.rte/Index.ini :

DataModule
IncludeFile = Maxi.rte/Actors.ini // <- COPY THIS LINE

Then paste these into the Base.rte/Index.ini, just ABOVE activities. Like this:

DataModule
IncludeFile = Base.rte/Materials.ini
IncludeFile = Base.rte/Sounds.ini
IncludeFile = Base.rte/Effects.ini
IncludeFile = Base.rte/Ammo.ini
IncludeFile = Base.rte/Devices.ini
IncludeFile = Base.rte/Actors.ini
IncludeFile = Base.rte/Scenes.ini
IncludeFile = Maxi.rte/Actors.ini // <- Paste Mods here ...
IncludeFile = Base.rte/Activities.ini // <- ... Just above this line.

(This way Mods are defined before Activities.ini is read. As in ... first you tell the game who Maximillian is, then you tell the game to spawn him.)

Ok, NOW you can use Maxi in your Activities.ini. But, when you get in-game, the buy menu shows him twice. Why? Because He's being created by the Base.rte/Index.ini AND the Maxi.rte/Index.ini ... Mushroom Head fixes this nicely:
Open the mod's Index.ini . In this case, Maxi.rte/Index.ini, and comment out everything under DataModules. Like so:

DataModule
// IncludeFile = Maxi.rte/Actors.ini

Now you have a perfectly integrated Mod! Just look up the name of the Actor/Weapon/Dropship, and use it in Activities.ini. Watch out, these ARE case sensitive.

NOTE: WHEN USING MANY MODS TOGETHER, YOU MAY RUN INTO SOME ISSUES ...
*NAMING. If two mods use the same name, you'll have to change one of them in order to use both in the Activities.ini. For instance, two mods call an actor "My Actor". Change one actor's InstanceName to "My Actor2", or the actors will clash.
*CUSTOM MATERIALS can cause clashes when a mod tries to create a material using an already-occupied index number. Normally, Data designed the game to just treat each Mod seperately, but when you add them to Base.rte/Index.ini ALL Mods use the same material index. To fix, find the Custom Material which is causing an error, and change it's index to an unused number. (Look in Base.rte/Materials.ini for useable material index numbers)

Just ask if I need to explain something better, or add something I missed.

Someone please give me a hand with adding Groundklearer-wielding terrorists to my game... Note specifically VersusTActivities, Index and Weapons/Rifles/Bunklearer. What am I doing wrong?

Couldn't you just:

1. Take out "IncludeFile = Activites.ini" in Base.rte/Index.ini
2. Copy Activities.ini from Base.rte to your folder with the actor you want. In my case, Grif.rte
3. Edit Activites.ini in the way that you like, aka changing all Dropships to Lightning.
4. Go to that folder's Index.ini and add "IncludeFile = Activities.ini"
5. Open the game
6. You should now have a lightning storm! If you did what I did.

You want me to add pictures?

In order to do it that way, you would need to go into the code, edit everything that says


To


For Every Single One.

How do you change activities so the actors spawn in rockets?

I'm just going to explain what each does. If you still can't understand, tough luck.
This is a part of the Activities.ini


Same for the rest.
For example, if you want it to spawn in rockets, change
AddAttackerSpawn = ACDropShip
CopyOf = Drop Ship MK1
To
AddAttackerSpawn = ACRocket
CopyOf = Rocket MK1

Please correct me if I'm wrong.
And, to find the stuff, just dig around in the code, see how things are done.

Yes, you can do that! You'll have to use the Base.rte/Index.ini if you want more than one Mod in Activities.ini, though.