Code my 1 page design

Attached is my one page design. This design is supposed to sit CENTERED HORIZONTALLY in the page, regardless of screen resolution. The form code is easy. It is from [login to view URL] Just cut and paste this code to add the form into the correct location: <iframe height="235" allowTransparency="true" frameborder="0" scrolling="no" style="width:100%;border:none" src="[login to view URL]"><a href="[login to view URL]" title="html form">Fill out my Wufoo form!</a></iframe> <small><a href="[login to view URL]">Powered by Wufoo</a></small>