I've got a simple wordpress website however the customer wants a vbulletin forum with similar consider the web site. exactly the same look is only a matter of editing the css files and layout files. but how do i place the vbulletin right into a wordpress page?

Edit your vBulletin to achieve the same look as the website, and employ an <iframe> within your Wordpress templates (index.php, page.php, etc, I'm not sure the way your Wordpress Theme is structured) together with your vBulletin path.