VI. STEP

in /checkout_payment.php

Find :
      <tr>
        <td><table border="0" width="100%" cellspacing="0" cellpadding="2">
          <tr>
            <td class="main"><b><?php echo TABLE_HEADING_BILLING_ADDRESS; ?></b></td>

Add before :
<?php //-----   BEGINNING OF ADDITION: MATC   -----//
if($HTTP_GET_VARS['matcerror'] == 'true'){
?>
	  <tr>
        <td><?php
$matc_error_box_contents = array();
$matc_error_box_contents[] = array('text' => MATC_ERROR);
new errorBox($matc_error_box_contents);

?></td>
      </tr>
<?php } //-----   END OF ADDITION: MATC   -----// ?>


Find :
                <td><?php echo tep_draw_textarea_field('comments', 'soft', '60', '5', $comments); ?></td>
              </tr>
            </table></td>
          </tr>
        </table></td>
      </tr>
      <tr>
        <td><?php echo tep_draw_separator('pixel_trans.gif', '100%', '10'); ?></td>
      </tr>

Add after :
<!-- BEGINNING OF ADDITION: MATC -->
<?php
if(MATC_AT_CHECKOUT != 'false'){
	require(DIR_WS_MODULES . 'matc.php');
}
?>
<!--   END OF ADDITION: MATC   -->


Find:
      <tr>
        <td><table border="0" width="100%" cellspacing="1" cellpadding="2" class="infoBox">
          <tr class="infoBoxContents">
            <td><table border="0" width="100%" cellspacing="0" cellpadding="2">
              <tr>
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
                <td class="main"><b><?php echo TITLE_CONTINUE_CHECKOUT_PROCEDURE . '</b><br>' . TEXT_CONTINUE_CHECKOUT_PROCEDURE; ?></td>
                <td class="main" align="right"><?php echo tep_image_submit('button_continue.gif', IMAGE_BUTTON_CONTINUE); ?></td>
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
              </tr>
            </table></td>
          </tr>
        </table></td>
      </tr>


Replace with :
                    <tr>
        <td><table border="0" width="100%" cellspacing="1" cellpadding="2" class="infoBox">
          <tr class="infoBoxContents">
            <td><table border="0" width="100%" cellspacing="0" cellpadding="2">
              <tr>
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
                <td class="main"><b><?php echo TITLE_CONTINUE_CHECKOUT_PROCEDURE . '</b><br>' . TEXT_CONTINUE_CHECKOUT_PROCEDURE; ?></td>
                <?php //-----   CHANGE IN ROW BELOW: MATC  - Added id="TheSubmitButton"   -----// ?>
                <td class="main" align="right"><?php echo tep_image_submit('button_continue.gif', IMAGE_BUTTON_CONTINUE,'id="TheSubmitButton"'); ?></td>
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
              </tr>
            </table></td>
          </tr>
        </table></td>
      </tr>