Thanks for sharing this work.

I did well to install zen_ninesixty (previous version) and get going just fine in 16-columns, but when the project required switching to 24, I found myself starting over (at least to begin with). Having started over, however, I am finding that I was not getting 24 columns.

To fix:
I followed "subtheme" ninesixty's instructions (http://drupal.org/node/613072#comment-2869376), but zen_ninesixty's page.tpl.php appears to override with a fixed ".container-16" in #page. In zen_ninesixty (or a subtheme to that if you've gone and further subthemed that-- seems that would be proper to do?), update page.tpl.php in two places: replace ".container-16" with ".container-24" and replace "grid-16" in an ns() function to "grid-24".

Is this the best/only way? Seems maybe the 16s here should be pulled from the (properly configured) ninesixty theme which zen_ninesixty is subtheming?

Thanks
-Bronius