How to creat a new page without my logo for a sponsor

My website is have never been commercially operated but I need to purchase a very expensive data feed and so I’ve looked at commercial sponsorship for the first time, there is a company willing to sponsor the site but I am having real difficulty in figuring out how to meet their needs.

Specifically, what I need to do is create a new page that can be accessed via my homepage but with their branding/logo etc once you click through to it.

Do I create a new website for this? There doesn’t seem to be a way to remove my logo when I create a new page.

Is there another way of achieving my aim? I’m really stumped so any help would be very much appreciated.

My website is http://www.whichinvest.com

Thanks, Luke