how to center inner body

I have a wordpress template (studio press -> metric template) and want to use a static page as the home page.  I changed it in the dashboard (Settings->Reading) but the page then became left justified.  I had to force a white background on the page but still I cannot get that inner body area to be center justified.  Any ideas?  The site url is:  http://www.saltlakecityappliancerepair.org/

Here is the css in that template:

#inner {
      width: 960px;
      margin: 20px auto 20px;
      padding: 0;
      overflow: hidden;
      background: #FFFFFF;
      }
      
.home #inner, .home-page #inner, .blog #inner {
      width: 100%;
      margin: 0;
      }