Help with Merging PHP Code

[Johnnycopilot]

I will be merging from "Responsive DIY Template Default for 1.5.x" plugin, to 12leaves "Abagon" Template, 5 pages total.
The instructions are

"Find all instances that look like this in the mentioned files:

<!--(BOF - 2.1) Responsive DIY Template Default for 1.5.x (65)-->

CODE

<!--(EOF - 2.1) Responsive DIY Template Default for 1.5.x (65)-->

and copy it to {your template} files

However, some of the files don't have a BOF that fit that description so I'm not sure what to do. I'll start with tpl_box_default_left.php, entire page. This particular page is an example of a page that does not have "!--(BOF - 2.1) Responsive DIY Template Default for 1.5.x (65)-->". Some of the other pages have that.

I need to merge this from "Responsive DIY Template Default for 1.5.x"

<?php
/**
 * tpl_box_default_left.php
 *
 * @package templateSystem
 * @copyright Copyright 2003-2005 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version $Id: tpl_box_default_left.php 2975 2006-02-05 19:33:51Z birdbrain $
 * Altered by rbarbour (ZCAdditions.com), Responsive DIY Template Default for 1.5.x (65)
 */

// choose box images based on box position
  if ($title_link) {
    $title = '<a href="' . zen_href_link($title_link) . '">' . $title . BOX_HEADING_LINKS . '</a>';
  }
//
?>


<!--// bof: <?php echo $box_id; ?> //-->
<?php if (COLUMN_WIDTH == '0'){ ?>
<div class="leftBoxContainer" id="<?php echo str_replace('_', '-', $box_id ); ?>" style="width: <?php echo $column_width; ?>">
<?php }else{ ?>
<div class="leftBoxContainer <?php echo $minWidthHide; ?>" id="<?php echo str_replace('_', '-', $box_id ); ?>">
<?php } ?>
<h3 class="leftBoxHeading" id="<?php echo str_replace('_', '-', $box_id) . 'Heading'; ?>"><?php echo $title; ?></h3>
<?php echo $content; ?>
</div>
<!--// eof: <?php echo $box_id; ?> //-->

With my Abagon Template

<?php
/**
* Template designed by 12leaves.com
* 12leaves.com - Free ecommerce templates and design services
*
* Common Template
* 
* @package languageDefines
* @copyright Copyright 2009-2010 12leaves.com
* @copyright Copyright 2003-2005 Zen Cart Development Team
* @copyright Portions Copyright 2003 osCommerce
* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
* @version $Id: tpl_box_default_left.php 2975 2006-02-05 19:33:51Z birdbrain $
*/

// choose box images based on box position
  if ($title_link) {
    $title = $title . ' - <a href="' . zen_href_link($title_link) . '">' . BOX_HEADING_LINKS . '</a>';
  }
//
// #wel - category header style
  if ($box_id == "categories" || $box_id == "bestsellers") {
    $header_left = 'main-sidebox-header-left';
    $header_right = 'main-sidebox-header-right';
  } else {
    $header_left = '';
    $header_right = '';
  }
//
?>
<!--// bof: <?php echo $box_id; ?> //-->
<div class="leftBoxContainer" id="<?php echo str_replace('_', '-', $box_id ); ?>" style="width: <?php echo $column_width; ?>">
<div class="sidebox-header-left <?php echo $header_left; ?>"><h3 class="leftBoxHeading <?php echo $header_right; ?>" id="<?php echo str_replace('_', '-', $box_id) . 'Heading'; ?>"><?php echo $title; ?></h3></div>
<?php echo $content; ?>
</div>
<!--// eof: <?php echo $box_id; ?> //-->

Any help would be appreciated. Thanks