Hi Marc,
JBoss AS 7.x uses Remoting 3, which is a whole separate code base. I don't know much about it, to tell the truth. Don't think there's much documentation, yet, either.'
You could try posting the question on the EJB3 forum (https://community.jboss.org/en/ejb3) or the AS 7 forum (https://community.jboss.org/en/jbossas7).
-Ron