Well, when you downloaded the map, you need to place...
The map (fhm.) file needs to go in the exports.
Computer -- FeralHeart -- Exports
If you have winRAR or any sort of something, you need to move the object files into
Computer -- FeralHeart -- Media -- Objects -- My objects
If you dont have winrar or any program like that, you can download it free.
There are also many cool maps in the maps section of the folders. You should take a look there.