Sorry about the site, I had to install some updates and turned off the server, forgot to turn it back online again.
Now when it comes to the Feralcity map things like flags and billboards should show up just fine, the only known issue is that sometimes certain images can disappear into the mesh it's placed upon, not sure why but the only guess I'm having is that the image is placed to close to a mesh. However this occurs at random and can happen for everyone so I'm wondering if it has something to do with the loading of a map inside of the game.
However if you are actually missing the stuff and never getting them to show up, it could have to do with your installer that you need to re-download again.
But I myself, usually just need to reconnect to the map a few times and the few images that wont work start working again if they actually don't appear. Nothing wrong with the installer itself though.