Well floof, I will also add to BigBangTheorys post ^.^
1.) Download the map you desire.
2.) Unzip the file folder, there is a program that is free and safe to use for this called Zzip.
3.) Copy all files inside of the folder, then go to Feral Heart>Exports> and Paste everthing inside.
4.) Open Feral Heart, and go to Cape Of Distant Worlds. There you shall find the portal with the map name on it, enter the map, it may take 2 trys but it will work ^.^