I was able to successfully deploy Alfresco (v2) on WebSphere 6.1 after a few mods on a web.xml:
WEB-INF/faces-config-custom.xml to ,/WEB-INF/faces-config-custom.xml
Now I have any error or warning message into log file, but the first home page present only static information (image, logo, link, …) and any button or menu.