Mine

	<vbox flex="1" minWidth="500">
		<menulist id="plcmenu" height="50" datasources="rdf:null" ref="http://www.mokosync.com/all-plugins">
				<template>
					<menupopup>

					<menuitem uri="rdf:*" label="rdf:http://www.mokosync.com/rdf/plugin#name"/>
				</menupopup>

				</template>
		</menulist>
		<listbox flex="1" id = "plch"  datasources="" ref="http://www.mokosync.com/all-plugins" minWidth="200" height="400">
			<listhead>
				<listheader label="Plugin"/>
				<listheader label="file"/>
			</listhead>
			<template>
				<listitem uri="rdf:*">
					<listcell label="rdf:http://www.mokosync.com/rdf/plugin#name"/>
					<listcell label="rdf:http://www.mokosync.com/rdf/plugin#file"/>
				</listitem>
			</template>
		</listbox>
	</vbox>
	<script>
		netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
		setElementDatasource("plcmenu", getURLFromFile(get_tmpfile(DTMP_CONFPL)));
		setElementDatasource("plch", getURLFromFile(get_tmpfile(DTMP_CONFPL)));
	</script>

---------------------

function	setElementDatasource(ident, url)
{
	netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
	var ds = document.getElementById(ident);
	ds.datasources = url;
}