web application deployment in oc4j

[Ranadhir Nag]

We package the application from our development tree,and deploy it into OC4J - the ear file gets copied into applications folder;so far so good.
But if we want to refresh(hot deploy) the JSP pages(recompile =true) ,without needing to repackage the WAR/EAR file, how do we do it?
Currently we need to repackage the war file every time a change is made in any of the JSPs.

What is the deployment-directory entry in server.xml meant for?
Does Oc4j explode the packaged application file into that location?