Problems in Websphere 6.0 when using myfaces/tiles

[Do...@Lawson.com]

I'm having trouble getting myfaces running satisfactorily under websphere 
network deployment 6.    Everything seems to be classloader related i.e. 
websphere packages its own jsf-api.jar with implementation of 
FacesServlet.

In general the behaviour I saw was the jsf pages were being truncated i.e. 
only some portion of the html was being returned by the websphere web 
server.

In an attempt bypass IBM's jsf world,  I defined all the factory classes 
in the factory node of my web apps faces-config.xml as follows.

  <factory>
          <application-factory>
                  org.apache.myfaces.application.ApplicationFactoryImpl
          </application-factory>
          <faces-context-factory>
                  org.apache.myfaces.context.FacesContextFactoryImpl
          </faces-context-factory>
          <lifecycle-factory>
                  org.apache.myfaces.lifecycle.LifecycleFactoryImpl
          </lifecycle-factory>
          <render-kit-factory>
                  org.apache.myfaces.renderkit.RenderKitFactoryImpl
          </render-kit-factory>
  </factory>

Still no dice.  I get a class cast exception

java.lang.ClassCastException: 
org.apache.myfaces.application.ApplicationImpl
        at 
com.ibm.ws.jsf.configuration.FacesConfigParser.createFacesFactories(FacesConfigParser.java:950)
        at 
com.ibm.ws.jsf.configuration.FacesConfigParser.initializeConfiguration(FacesConfigParser.java:327)
        at 
com.ibm.ws.jsf.util.FacesConfigUtil._parseJSFConfiguration(FacesConfigUtil.java:128)
        at 
com.ibm.ws.jsf.util.FacesConfigUtil.parseJSFConfiguration(FacesConfigUtil.java:82)


My last resort was to place the jsf-api.jar provided by websphere into the 
console application's WEB-INF/libs directory and restart websphere.   At 
that point,   My jsf pages loaded correctly on one of my websphere 
appservers and not the other.

I've tried changing the websphere classloader for my web app to be 
PARENT_LAST.

Any ideas,  how I can avoid all this?   It seems that if I can guarantee 
that myfaces javax.faces.webapp.FacesServlet gets loaded then I'm ok.