Personally I found this useful and wanted to share. Originally posted on https://scunster.co.uk/?p=548 Quick help for downloading, installing compressing and using custom maps in KillingFloor 1) Download a custom map and place it in your maps folder. 2) Change to your system folder and type the following: ./ucc-bin compress ../maps/mapname.rom -nohomedir This will compress the map into into a much smaller size and display .uz2 at the end of the map name. This will reduce download time and keep bandwidth to a fraction of what it would have been without compression. 3) Go to your map folder and you’ll see the compressed map as <mapname.rom.uz2>. 4) Remove this compressed map from your map folder and upload it to your third party host / webserver 5) Go to your KillingFloor.ini and locate [IpDrv.HTTPDownload] In the RedirectToURL= place the location of the compressed map: RedirectToURL=http://www.yourhost.com/maps/ Note the forward slash at the end of the redirect link. By default you will see UseCompression=True is already set. 6) Find the [DefaultKF MaplistRecord] in your KillingFloor.ini and add the name of the map to the bottom. You can also perform this task in the Web Admin Interface. 7) Restart your server and perform a Map Vote for the new map.