Need help with scenario editor and creating custom units.

Hi everyone,

So, I wish to create a cool custom scenario (and maybe even a whole custom campaign) with a Fallout-ish theme. I never have created a map in my life, but I have played with the scenario editor before. So today I launched the editor and I started exploring the trigger options - and discovered that they're pretty limited.

I can create a custom unit provided that I set a trigger that changes names/hp/armor/damage of a unit that I want modified - but that's not enough for me. For example, when I launch Advanced Genie Editor I have access to every piece of the unit, like different armor/attack classes, unit portraits and so on. I would like very much to use those.

How do I create a scenario with custom units modified with Genie Editor?