To download a map you must find a map that provides you with either a .rar ,ZIP folder, or a setup.
NOTE: If you do however come across a .rar file, then I suggest you get this program called Winrar. It's a programs that unpackages your file and make it usable
If a map provides you with the needed link, then simply click it and download your file. Once you have your downloaded map, then open it up and it should have a "Read Me" notepad or Instructions of some sort. You will need to place all your items in the Feral Heart folder that is located in your Local (C:) drive. Place all the needed files in your export folder, while the others such as music and textures go in there own folders. Once you followed the Read Me note and or put everything in the needed file. Then restart the game and head for Caps of the Distances. There you will see another portal that will lead to your downloaded map.