Ah, right, confusion confusion. This is regarding the Gone Native Civilians, which has a thread right here
. I'd move this topic around again, but I think it's seen enough jumping, so I'll just lock it so as not to confuse people.
As to the question, I suggest you simply copy the init.sqs (file) in the test mission the script came with to your own mission, since it will have all the necessary commands in it already. If you don't know how to do any of these things, check out the Beginner's tutorial
for an introduction to all things .sqs and editor-wise (check out the "External files" section in particular).
Otherwise, just go to the thread linked to above and ask the maker of the script if you can't get it to work.