As a measure of caution, and fearing a breakdown of Alfresco, I took the following steps:
1. Instead of unzipping OVER my installation, I untarred the alfresco-community-wcm-2.1.0.tar.gz ball outside the alfresco folder, in a directory called wcm.
2. Copied the wcm/extras/wcm folder to /alfresco/extras.
3. Copied wcm-bootstrap-context.xml to /tomcat/shared/classes/alfresco/extension/
4. Copied /wcm/virtual-tomcat to /alfresco/virtual-tomcat
5. Copied /wcm/virtual_alf.sh to /alfresco/
Before I restart Alfresco, my question is this: Could this procedure be equivalent to unzipping direcly in the /alfresco folder?
Success or failure, I'll post a follow-up. Meanwhile, if you think otherwise please let me know.
Tierno