adding a row to main index page?

[optic]

I just want to add a simple row into the center table of my OSC site. I assumed modifying the catalog/index.php would do the trick, but nothing.

 

I know there is a way to modify the left and right columns, but what about the center of the page with all the featured products and expected products and the greetings.

 

Any help would be appreciated.

 

- O