[KTP]

if you make an xml file using the following:

<?xml version="1.0" encoding="ISO-8859-1"?>

<plugins>
	<plugin active="1">
		<title><![CDATA[[you]]]></title>
		<hookname>global_complete</hookname>
		<phpcode><![CDATA[$output = str_replace('[you]', $vbulletin->userinfo['username'], $output);]]></phpcode>
	</plugin>
</plugins>

then upload as a plugin, it works perfectly.