[SR-Users] XMPP- component mode

Hi Kamailio community, I am working around with Kamailio (V 4.0.3), its XMPP module- component mode and jabbed2 server, intended to get file transfer feature between two SIP clients. In a way while surfing through the blogs i got some info like this: 'In component mode, a sub domain is diverted to respective component,so you don't need users in XMPP sever'. (http://lists.sip-router.org/pipermail/sr-users/2010-August/065209.html). With this my question is: what does it mean ? Is it mean like i dont need to register xmpp clients to jabbedd2(xmpp) server ? If this is the case, How can i use my SIP users (registered to kamailio server) in jabberd2 server context ? Even XMPP module's man page doesn't give clarity about these questions. Any help will greatly appreciate. Regards, Ravi