Including DTD's with plugins

[Ross Gardler]

I'm no expert when it comes to catalogs and it's late so I am not going 
to try and fix this now. Perhaps someone can point me at the right docs 
somewhere on the web to tell me how to do this when I return to it 
tomorrow afternoon (GMT).

My question is simple how do I extend the catalog files used by forrest 
with catalog files that are supplied with plugins?

I can do this by building the catalog file on each run in the same way 
that we build the plugin xmap files, however, is there a way to do it by 
telling the catalog to import all catalog files in a directory tree?

Ross