Falcon stated it could be on any previously made map. Therefore this would take a few minutes. So easy, even a godzfire can do it.
Find a map you want, extract it to the local folder if it isn't a default map. UnTag can disassemble plugins. Load the map in Loathing, open the tool for units (has a picture of a warrior). Double click that tool for a window to appear with a list of unit types the map uses. Select all the unit types in the list and delete. Add one set of units (warriors) you want for each team (team 0 and team 1 since its a 2-team map). Add observers (a big eye ball) for each team. It will be where the camera starts for that team when the map loads. Click on the map actions tool (has a picture of a flag), select all map actions and delete if it has any (if the map was a solo/coop). Save and close Loathing.
Open Fear. Make a string list tag in Fear where you will type the name of the map. Duplicate the string list tag and alter the name so you have a unique string list with a unique map name per map. Go to the mesh section in Fear and open the map you had messed with under Loathing. For "Map Description" select the string list tag that has the map's name. Duplicate the mesh tag so you can make the other variants. Link the correct string list tags for each mesh tag to point to their correct map names. Close Fear and Open the mesh you duplicated earlier. Remove the warriors and add the other units per team per mesh you are messing with.
When you are done open Fear, go to File... Build Plug-in File to create the plugin. Select all the tags that will be included in the plugin. Click OK, and it will be made in the plugins folder. Close Fear and remove your local folder. Delete it or just rename it. The end.
