With the Thesis Theme Framework, there is a lot you can do from the Wordpress Thesis Interface. You can build you screen with the Skin Editor; you can style your page with the Custom CSS. However, at some point you may want to do more. This may involve you changing or creating new Php functions [...]
After 7 beta version of Thesis 1.5, Chris Pearson from DIYThemes finally released the much anticipated theme. With Thesis 1.5 you can now specify any width you want for your site.
Thesis Skins and Boxes for Thesis Theme Framework