Find out where all the files then make your tree of folders like that. For example, if I wanted an add-on's file to go into Blockland/Add-Ons/Falcon, I'd package the .zip so there's Add-Ons, and Falcon inside that, with the file inside Falcon.
In your case, it'll probably be Base, Data, and Terrains, or something similar.
Look at any decent add-on for a better example.