ok i know it is probably simple but how do i put a box around my main product image on my product page like the box around the add to cart button on my product page

http://www.rickiesdiscountelectronic...ory-21468.html

and like they have around their product image on this page:
http://www.echo-electronics.com/dual...ck-p-1280.html

i know you have to modify the tpl_product_info_display right?

what code do i need to add in order for it to do that?

thanks in advance.