jboss portal deployment from 2.4.1.SP1 which is built with jdk1.4 fails to deploy in platform edition which runs with jdk1.5.

Following MBeans have problem getting deployed:

ObjectName: jboss.web.deployment:war=portal-core.war,id=1427379391
State: FAILED
Reason: org.jboss.deployment.DeploymentException: URL file:/C:/qa/platform-testing/jboss-4.2.0.CR1/server/default/deploy/jboss-portal.sar/portal-core.war/ deployment failed

ObjectName: portal:deployer=Adapter
State: FAILED
Reason: org.jboss.portal.server.deployment.CannotCreatePortletWebAppException: JBossWeb cannot handle it
I Depend On:
jboss.web:service=WebServer
portal:deployer=PortalWebApp

Some related errors that I see in server.log are:

ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/portal-core]] Error configuring application listener of class org.apache.myfaces.webapp.StartupServletContextListener
java.lang.ClassNotFoundException: org.apache.myfaces.webapp.StartupServletContextListener

My little search tells that this class is present in myfaces-impl.jar and I don't see this in the platform edition of jboss. I believe the new web container has different implementation in jsf-api.jar and jsf-impl.jar.