cool grid plugin, didnt know of that, but I have the gold one from the WPEC guys.
well post your site...........or
I use a plugin called firebug in mozilla firefox browser. you can select html, right click, click 'Inspect Element with Firebug'. And it will pull up a browser with that area selected and show the DIV tag names you might search to find what your looking for.
I then search my WPEC folder for those words.
Has been amazingly helpful for finding these type of things to modify, including colors changes, font size changes etc.
You need some HTML backgroud to decipher the code.
**Comment out, try not to delete the code, then you can always go back if you mess things up.
these are PHP pages so use this
<?php /*?>code to hide<?php */?>