Picture Floating Right of Thumbs in Siriux

Hi,
I'm trying to float an image to the right of my main gallery page thumbs but I can't seem to figure it out. I've floated the thumbs to the left and made their width 46% but when I try to float an image next to them it either all screws up or the image is above the thumbs. Can someone help me?

http://www.katherinewagnerdesigns.com/gallery/main.php

Also, it seems like the width at 46% doesn't look the same in IE as it does in FF. It's a larger width than in FF so there are 4 thumbs per line instead of 3. Is there a way to change this?

Thanks, Matt