We will to add some custom maps to the rotation list.

To join server when one of them is used, you need to have that maps in your game installation.
If you don't have yet, you need to download and install.
Installation process is very easy, takes less then one minute, and do not cause any incompatibility with other servers.
Clean uninstall is possible too.

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Instructions:

Installation: 
Download map archive.
Browse to folder where you have installed Battlefield2.
(Usually installation path is "C:\Program Files\EA Games\Battlefield2")
Browse to subfolder "mods", then to subfolder "bf2" and then to subfolder "levels".
Unpack contain of map archive to this location.
That's all.

Uninstallation: 
Just delete subfolder contained new map... That's all.