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5. Expand the Alfresco 2.1.2 WAR into the Tomcat webapps/alfresco directory (which you'll have to create the first time). If you are tweaking the install (such as pointing to a specific MySQL database, using something other than MySQL, pointing to a different data directory, etc.) make sure you have copied your good set of extensions into Tomcat's shared/classes/alfresco/extension directory.
alf_databinendorsedextensionsextraslicencesalfresco.war
9. Now you need to configure Alfresco as a Liferay plug-in. This involves adding four files to Alfresco's WEB-INF directory: liferay-display.xml, liferay-plugin-package.xml, liferay-portlet.xml, and portlet.xml. Why aren't these available in the Alfresco source or on the wiki? Apparently someone tried to address this at some point because there is a link on the wiki but it is broken. Until that's addressed, I've put them here.