Very often the question is asked on how to collapse the left column in a template. Here is a method on how to do this with for instance in the very popular Rhuck_Solarflare_ii:

in /templates/Rhuk_Solarflare_ii/index.php replace this:

<div id="left_inner">
 
 </div>
 </div>
 <div id="content_outer">

with this :

<?php
 if ( !(mosCountModules( 'left' )) ) {
 ?>
 <div id="content_outer2">
 
 <div id="left_outer">
 <div id="left_inner">
  
 </div>
 </div>
 <div id="content_outer">
 <?
 }
 ?>

then in the /templates/Rhuk_Solarflare_ii/template_css.css file
add this:

 #content_outer2 {
 padding: 0px;
 margin-top: 0px; 
 margin-left: 0px;
 /** border: 1px solid #cccccc; **/
 float: left;
 width: 800px;
 }