- Stop your server.
- Click "Steam Workshop"
- Install the custom map you want on your server - in this case, it's this one: https://steamcommunity.com/sharedfiles/filedetails/?id=2377569193
- Go back to gamepanel home page
- Click "Commandline Manager"
- Click "Select" on the "Custom" commandline
- Type in the map name in the "Map" text-box - if you are unsure, check the mod's description or ask the mod developer (or ask us!)
- Click "Apply"
- Startup your server, enjoy!