my_grid.sass

@import 960/grid.sass

#gallery
  +grid-container
  // Or whatever gallery wrapper white padding used to be
  padding: 1em 0
  background-color: white

#images
  +grid(9,12)
  .image
    +grid(3,12)
    text-align: center
    img
      // Or whatever .border used to be
      border: 1px solid #777
  .alpha
    +alpha
  .omega
    +omega
#sidebar
  +grid(3,12)

pretty_960_gs.html

<div id="gallery">
  <h2>Dixie Diamond</h2>
  <div id="images">
    <div class="image alpha">
      <img src="/images/girls/dixiediamond/classy_gal_small.jpg" alt="Classy Gal" />
    </div>
    <div class="image">
      <img src="/images/girls/dixiediamond/fire_martini_small.jpg" alt="Fire Martini" />
    </div>
    <div class="image omega">
      <img src="/images/girls/dixiediamond/the_dress_small.jpg" alt="The Dress" />
    </div>
    <div class="image alpha">
      <img src="/images/girls/dixiediamond/whiteflower_small.jpg" alt="White Flower" />
    </div>
    <div class="image">
      <img src="/images/girls/dixiediamond/olden_days_small.jpg" alt="Olden Days" />
    </div>
    <div class="image omega">
      <img src="/images/girls/dixiediamond/squished_small.jpg" alt="Squished" />
    </div>
  </div>
  <div id="sidebar">
    {% include sidebar_ads.html %}
  </div>      
</div>