Specifying Grid Columns by Category

You were very helpful in showing me how to use CSS to set the number of columns in the product grid differently for a particular category.

Unfortunately, I need this product grid to be 5 columns not 4.

I tried to adjust the CSS you previously provided to make it 5 columns instead of 4, but all I could do was break it.

Here's the original support request with the CSS for changing the grid from 3 to 4:

Here's the actual page that needs to be 5 columns:

I also need to reduce the vertical space between the grid rows so that the distance between the add to cart buttons and the next row is reduced - like on this page:


You have support access and FTP info if you need to access the site.