You should just be able to place the unzipped main folder (containing all the others) into the community folder and start the sim, as far as i know, any add-ons must be in the community folder before the sim is started.
You should just be able to place the unzipped main folder (containing all the others) into the community folder and start the sim, as far as i know, any add-ons must be in the community folder before the sim is started.