Mia-Software organized its 3rd user ocnference on thursday 2008 March 27th in the "Centre de conférences Etoile Saint Honoré" in Paris, including a testimony from CNP Assurances on its operationnal MDA approach for back-office J2EE. Specifically, it has been explained how to bring an existing Java application into an MDA process by the mean of reverse-modeling than regeneration.