Right now I am using Transaction demarcation with plain JDBC, but in term to use Transaction management with JTA what short kind of configuration changed do i need to make?

Short version:
Need to fetch the UserTransaction in code and need following configuration changes.
hibernate.transaction.factory_class
hibernate.transaction.manager_lookup_class
With this hibernate will automatically detect the JTA for your JEE container.

Longer version:
Please follow this link
<url>http://www.hibernate.org/42.html#A5<url>

Let me know if this helps.

I am using Hibernate 3.2.6 + Spring 2.5.5 + JBoss 4.2.2.GA + envers 1.1.0.GA, and envers was not writing the versioning records once we switched from Spring's HibernateTransactionManager to its JtaTransactionManager (I could see that the envers beforeCompletion() hook was not being called) . Adding to my Hibernate config fixed the issue.

Thanks, rajiv65!
-Daniel-