Hi ,
You can design a custom html page as per your requirement and open that html page in your lookup view.
Please see below link how to open custom html page in lookkup view.
http://lakshmanindian.wordpress.com/2012/10/02/open-crm-2011-lookup-window-in-a-custom-html-page/
Thanks,
Sravan.J
If this helps please mark as answer.