AddMapQ3

Usermaps can´t be fully integrated in Quake III without problems. With the command "map whatever" you can start them over the console, but they won´t appear with a levelshot in the Singleplayer/Multiplayer menus.

The mod "UIarena" by YoGrE includes all maps in the menus without problems. But it can´t offer this functionality for other mods. So you need a tool wich is able to change the settings in the .pak-files themselves.