Client UI Windows

[trevius]

The only way to limit stuff like that is by setting your server to a specific expansion like classic, which is done by adjusting the expansion field in the variables table. That then causes the client to be restricted to most of the stuff that was only available at the highest expansion you allow them access to from that variable. I think it also means they would only be able to access the content (zones, playable races/classes, etc) from that specific expansion or earlier.