Put the name of your chatroom in place of ROOMNAME IN this script..
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. Use with your Owner JID.
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<iqto="ROOMNAME@conference.nimbuzz.com"type="set" 0773603198-trick-master="admin_modify"><queryxmlns=" http://jabber.org/protocol/muc#admin"><itemjid="ROOMNAME@conference.nimbuzz.com"affiliation="member"/></query></iq><iq>to="ROOMNAME@conference.nimbuzz.com"type="set" 0773603198-trick-master="admin_modify"><queryxmlns=" http://jabber.org/protocol/muc#admin"><itemjid="ROOMNAME@conference.nimbuzz.com"affiliation="outcast"/></query></iq>
ENJOY. . .