Jahia 4 Versus Jahia 5 Portlets

I've started to deploy some portlets/webapps to Jahia 5 and the only way I
can get these to be visible by Jahia is to define them as true portlets
(using the portlet api and a portlet.xml file).  Many of the
portlets/webapps I want to port into Jahia 5 were basic struts web
applications we used in Jahia 4.  Can I deploy a basic non portlet api web
application in Jahia 5?  If so any help on how to do this would be
appreciated.

Thanks,
Tim