[Plugin: Collapsing Categories] Make posts & subcategories appear in columns?

Hi,

I want the posts & subcategories to appear in columns, sort of like the column layout OSX Finder has:
http://osxdaily.com/wp-content/uploads/2010/02/mac-os-x-finder-column-view.JPG

Is this possible, and could anyone help me achieve this?

http://wordpress.org/extend/plugins/collapsing-categories/