[map] adding terrain map

Maybe this has been discussed, but I can't find it so I apologize. How do I modify this excellent module to get the terrain map (G_PHYSICAL_MAP)? I tried hacking it into the module, but I can't seem to make it work. I thought it would be easy to do....just find the other map types and add this one in.

Thanks!

Gallery version = 2.2.2 core 1.2.0.4
PHP version = 5.1.6 apache2handler
Webserver = Apache/2.2.3 (CentOS)
Database = mysqli 5.0.45, lock.system=flock
Toolkits = ArchiveUpload, ImageMagick, LinkItemToolkit
Acceleration = none/432000, none/900
Default theme = carbon
gettext = enabled
Locale = en_US
Browser = Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9.0.5) Gecko/2008120121 Firefox/3.0.5
Rows in GalleryAccessMap table = 180
Rows in GalleryAccessSubscriberMap table = 8094
Rows in GalleryUser table = 5
Rows in GalleryItem table = 8092
Rows in GalleryAlbumItem table = 244
Rows in GalleryCacheMap table = 0