Thanks, I’ve done most of it now and my forum is working. The site is just going up (i.e. not ready), but the forum skin can be seen at http://www.retrographer.com/forum/
The software is most excellent
I think it’s a bug with your style sheet, but if you visit you might notice the hot tags go past the main window bottom. This is because the hot tags are a float and so have no content. It either needs a clear:both or a overflow:hidden at the end of the floated tags.