The customer is not alway right. You should tell them about the free production grade databases which run on windows (PostgreSQL and FireBird).
Thanks for the work. Can you post this as a patch on the JBoss project page on SourceForge.com?
I also recomend that you add a comment that "Access is never recomended for any use".
I agree with your assessment of Access. In my situation, the customer has a current Access application that their users enter data into that they want to report from real-time. Until they rewrite the Access application in a more civilized language, they will have to live with the performance and reliability issues inherent in MS Access.
I would be happy to post my configuration file on SourceForge (less the snide comments of course).