Go to their website at
http://www.wolman.com/
Find their contractor Manual info, and request a Contractors packet. You will get a big white binder chocked full of Wolmans propaganda.
There will be a multiple choice, 50 question test in the back of the binder. Use your manual as an open book study guide, and take the test. After you have completed, and it better be a 100%,considering it's open book, fax the answer sheet to Wolmans. They will issue you their certification.