the vti-module is installed correctly apparently, but the ROOT.war, that I place into tomcat/webapps (with alfresco.war, share.war and studio.war) after deleting the "old" one refuses to deploy automatically and I don't know how to do it "manually"…
I don't know where it's said in the doc or something but thanks for telling me by the way I still has an error when I try to create a shared workspace, telling me that the "server is busy" and to retry later…I should create another topic for that
I could deploy the ROOT.war following the indications found at http://wiki.alfresco.com/wiki/Alfresco_Labs_3a_Release_Notes. I know it's now useless for the latest version of Alfresco, but maybe it could be useful for someone using an older version ^^