Both Sidebars

I’d like to have a couple of the pages on my site with both the left and right sidebars and the content in the middle. I’m not scared of getting into the editor just can’t tell exactly what I need to change. I see that both the left and right sidebar pages have a class with the ID=”main” which indicates the left or right status (class=”col2-r” or class=”col2-l”) is it as simple as changing that, adding another section for the sidebar frame and using CSS (got a feeling there’s more to it)?

Thanks for any help.

Allen.