I'm creating a mod in which factories create unhappiness. The mechanics of gameplay work just fine, but i'm dissapointed i can't figure out how to alter the popup message that has to do with unhappiness. As it is, i'm stuck with this(attached image)...
Any help would be appreciated.

I think there is a text file in the "scenario/blah folder, and there is something about "scripts" thats it.

I've looked at the script.txt and i found the section regarding unhappiness, but i just don't know exactly what to do to make it work. It's not quite self explanitory ...hmm maybe i'll have another look. Has anyone else done this?

Get PTW, it will then say something like "a building in this city annoys me."

Willem: you are correct in assuming i have only civ vanilla, but strangely enough, the text you refer to already exists in my script.txt:

#UNHAPPY_REASON_BUILDING_THIS_CITY
"Some improvements in this city are annoying"


Maybe this script was updated in 1.29 gearing up for PTW and the programming wasn't in place yet. Anyway, i don't know if i can afford PTW at this time, i was hoping to solve my problems with a little know-how instead.