There's usually at least one bad token before you get into Feral City and I believe that's normal for most if not everyone. I don't remember if Red's Feral City map came with an installer or not but if it didn't:
You install downloaded maps like so:
1.) Follow the "read me" file if there is one and place the files in the places where it says or just place all the files into the "Exports" folder
OR
If placing the map files into the Feral Heart "Exports" folder didn't make it work right than try placing the files as so:
FHM files go into FH>Media>Terrains
FHO files go into FH>Media>Objects
FHS/FHW go into FH>Media>Sky
Mp3 files go into FH>Media>Sounds/Music
Then restart the game
Hope that helps.
If the black screen still occurs when you go in again try changing your games video settings because it might be that your game is having trouble loading the big meshes he used. Go into the game's main menu then select "options" then "video settings" and change your settings like so:
-Rendering Subsystem from OpenGL to Direct3D9
-View Distance to 0
-Water Reflection off
I hope this helps