how do i change the template or theme of the "site" created by the Blogs Directory plugin?

I had a theme that was supposed to be used as a template whenever a new site was created by a user. I got that to work finally.
However, when I installed the "Blogs Directory" plugin, it automatically generated a site which lists all the current blogs, but it does not match the theme of the blogs. I would like to make all the pages the same. Basically I would like to apply the same template theme to the page which lists all the sites/blogs, as the sites/blogs themselves use.

If you want to see exactly what I mean go to:
http://www.studioscale.com/index.htm
and click on the "Builders Blogs" link on the left hand side to see the list of test blogs. click on one of the blogs to see the theme.

Thanks in advance,
Helder