cobatron The other window will tell you that the script is loaded once you start the map.
Also to clarify for everyone else, I did get this mod working properly, I was just messing with inconsistent strategies. I lure the last zombie to the obelisk, look straight up to ensure the sky above is stormy (dont look left or right, look up from obelisk, that section needs to be lit up for Avogadro to appear) then kill them to summon it. Lure it over, plant turbine, throw EMP grenade at Avogadro. That usually triggers the last step.