I added some code to VFS that allows you to programmtically create a virtual directory structure composed of any URL, classloader resource, or byte array. The code is here: https://svn.jboss.org/repos/jbossas/projects/vfs/trunk/src/main/java/org/... Its incorporated into the VFS testsuite as well. If you want to see it in action, look here: https://svn.jboss.org/repos/jbossas/trunk/embedded/src/test/java/org/jbos... The two tests in there dynamically define an abstract jar from resources in the classpath and deploy it into an Embedded JBoss runtime. An EJB jar with a persistence unit is defined and deployed. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4034156#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...