Thesis 2 Design

Hello, actually i installed latest thesis 2.0 theme on my blog and i want to have 4 columns on my site (blog) and show my post like 2 by 2 in content column, for first column i want give like 190 width for ad some text and widgets and second column for conten and show my posts like [login to view URL] and third column like first column and give like 210 width and fourth column too give 190 width etc...