The TWW Design kit is intended for use by members of TWW and aims to smoothen your design experience around here. In case you missed the introduction, the post is linked here.
So how do I insert the media in the zip file into my posts?
WordPress does not allow you to take the images from a zip file and insert them, If you try, you will possibly end up having the entire file added into the media. So what should you do?
Firstly, open the downloaded zip file and copy all the folders. Paste them in another folder. You will be able to navigate through that folder in WordPress and use the image files in your posts.