I was looking for a different grid software other than gold cart and I found "Simple Cart". Very attractive.
I found instructions for setup and downloadable files here: http://www.chris-wallace.com/2009/07/17/simplecartjs-a-free-wp-e-commerce-thematic-child-theme/
The 3rd link does not work. I have looked elsewhere and can not find it.
If you know where I can get the complete details on this wordpress plugin let me know, I would like to try it.