[NA_Harlequin]

There are a few places that you can get your hands on it. The official place is: http://www.4-uk.net/ under the 'Fairplay' logo, but the links don't seem to work there. We'll be putting the required files on our site very soon, so check back frequently:
http://www.neoanarchy.barrysworld.net/
And unfortunately yes, it does kick custom maps, anything at all that is out of the ordinary in the installation directory. We'll be adding certain maps to the server soon however, and again, the map list will be on our aforementioned site.