here is my first wip
is doing this project to learn to model in houdine
http://picasaweb.google.dk/linuxdk1978/HoidiniWork?authkey=Gv1sRgCNXxlp3plJT-Gw#5362289662001495746 [picasaweb.google.dk]

Well its a start, but there isnt really much to see so far. Are those battlements seperate geometry, or are the modeled into the walls?

Also perhaps you can upload a single frame flipbook with the viewport set to flat wire shaded, so we can see the construction.