jquery-validate with custom methods and messages: radio button

jquery-validate with custom methods and messages: radio button

I have a form that uses the 'tricks' for custom methods and messages found here:  (see link below):
http://jqueryvalidation.org/files/demo/custom-methods-demo.html

HOWEVER I want to also add validation for my radio buttons to the mix and the demo above does not give me options for select | check | and radio ... I tried adding the 'trick'  for validating radio buttons from here (see link below) with no results.

Help?