1) Setup a dedicated server
2) Add the keys from 'working.zip' to the '\keys' folder of the server.
3) Connect to the server with no mods enabled (only the keys need to be there)
4) Start the server and notice you get to the map/mission select screen.
5) Stop the server.
6) Place the key from 'broken.zip' into the '\keys' folder alongside the existing keys. Keep the same (empty) mod set.
5) Start the server to the server and notice when you connect it hangs before the map/mission select screen.