Groovy/Groovy Console

Does anyone have a set of installation instructions in order to get a) Groovy working from the Scripting step and b) Groovy Console loaded in the Spoon Tools menu. I've tried both and can't seem to get either working correctly.

As a reference, here are two URLs that explain what I'm attempting to do.

http://funpdi.blogspot.com/2012/10/g...-with-pdi.html

And I have this plugin extracted in ../plugins/spoon/GroovyConsoleSpoonPlugin.

http://funpdi.blogspot.com/2012/12/g...h-jsr-223.html