When giving maps to other people, you usually need an account for things like 4share, Mediafire, or any other file-sharing device.
The download will actually consist of more than one thing if you used custom meshes/object packs that are not found within the original download of "FeralHeart".
Maps must also be exported through map-maker; when this happens you usually have to find the file of your map and place it into a .zip folder. This goes the same for any object files you have used. It usually helps to try to memorise your object files in this case, but if your a lazy derp like me, you can always just dump then into your zip file- by 'them' I mean the object files found in FeralHeart>Media>Objects, of course.
After packing them all into there, and uploading your .zip/.rar file to a file-sharing site, all's the really need is the link which you can send to your friends- and then your basicly all good! You and your friends can access your custom-map ;3
Edit: Suragah, you beat me too it~! >U