Create visual templates for a4j:core elements. Create templates already implemented RF4.0 elements, last RF 4.0 test project you can find here https://repository.jboss.org/nexus/content/groups/public/org/richfaces/examples/richfaces-showcase/4.0.0-SNAPSHOT/
Test page located here https://svn.jboss.org/repos/jbosstools/workspace/mareshkau/rf4.0/WebContent/a4j-core.xhtml