A couple of things (related)

The first is annoying white space below all of my images, no matter what the size they are. It is about 2px high, does anyone know how to fix this? Can be found here:
http://www.addfield.co.uk/index.php/addfield-mp100-incinerators...


Secondary, I'm looking to edit this picture section - as I want my thumbnail to be center align, and only be 3 thumbnails across before a new line begins - where is the layout for this image section that I can find in dreamweaver?

Thanks in advance.
James