If you're having trouble getting this plug in to work (by using the example files), here's a tip.
The documentation has the path wrong, so if you are trying to use the XML and XSL that come with the plugin, and are cutting and pasting the example from the documentation, don't use the default path.
The documentation uses the path
CPT_XslProcessor, which is not correct.
Change the path to
(note the xslprocessor, not the CPT_XslProcessor)
Now you'll be good to go!
This plug in works like a champ, BTW. It does exactly what I wanted it to do!