How would I install this on vbulletin? (modalbox)

[se_p800]

I found something called modalbox. Its basically a friendly javascript popup.

Here is the link to it:
http://www.wildbit.com/labs/modalbox/

These are the instruction given:
Installation

1. Download ModalBox and unpack to your /includes directory (you also need the prototype + script.aculo.us files there, which are included in the ModalBox package.)

2. Include the following JavaScript files in your pages:

<script type="text/javascript" src="includes/prototype.js"></script>
<script type="text/javascript" src="includes/scriptaculous.js? ?
load=effects"></script>
<script type="text/javascript" src="includes/modalbox.js"></script>

3. Include the CSS file modalbox.css in your pages:

<link rel="stylesheet" href="includes/modalbox.css" type="text/css"
media="screen" />

So could anybody please help me install this on my vbulletin? Thanks