eclipse and DocBook 5?

There's a very nice tutorial about using the Eclipse platform with the DocBook 4.5 DTD here:
http://www.vogella.de/articles/DocBook/article.html

But I'm using the RelaxNG setup for DocBook 5. I wonder if anyone has that set up in Eclipse yet?

I'm looking forward to using their XSLT debugger to watch how my customizations to the XHTML stylesheets go.

thanks,
--Tim Arnold