1. Upload infobar.css from the attached zip to /clientscript/vbulletin_css
2. Upload alert.png to /images
3. Edit header template and add this code at the top.
Code:
<if condition="$show[guest]">
<!-- Infobar -->
<link rel="stylesheet" href="clientscript/vbulletin_css/infobar.css" type="text/css">
<div id="info"><div id="infobar" align="left"><a href="register.php">You are not registered yet. Please click here to register!</a></div></div>
<!-- Infobar -->
</if>
