Follow the first part in this tut. "1st"
https://www.youtube.com/watch?v=9cGLY79x4ygOnce you have that done and saved your map, you need to put your exported map and it's object groups into a download. Most simple way to do this it that you make a new folder anywhere on your computer. Copy the mapname.fhm file and name.fho files(Object group exports that belong to the map) into the folder.
Right click the folder itself that holds the files in it, and select "Send to" then "Compressed "Zipped" folder".
Once that is done you can upload the zip to a file like mediafire.com sendspace.com or whatever you prefer and share the link around to those you want to give the map to, and telling them to extract the zipped folder and paste the content into the feralheart\exports folder.
If this was muddy you can probably find tutorials elsewhere on youtube that explains how to "share" the maps, or even in the tutorials section here on the forum.