How to prepare Association Class for mapping to ERD

Assuming you have two ORM Persistble classes associated by an ORM Persistable Association Class, how do you prepare the classes and the association to map to a many-to-many ERD implementation?

Please reference to the following movie on how to create association class for ORM class model in the following movie, and feel free to contact me if you need any help.

http://www.youtube.com/VisualParadigm#p/a/u/0/p2K-XsslRa8

Best regards,
Rain