This is the code in the "tpl_product_info_display.php" file.
Code:
<?php
/**
 * Page Template
 *
 * Loaded automatically by index.php?main_page=product_info.<br />
 * Displays details of a typical product
 *
 * @package templateSystem
 * @copyright Copyright 2003-2006 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_product_info_display.php 5369 2006-12-23 10:55:52Z drbyte $
 */
 //require(DIR_WS_MODULES . '/debug_blocks/product_info_prices.php');
 // Niroshan edited......
?>
<div id="mid_top"></div>
<div id="mid_bodypro">
<div id="mid_body_toppro"></div>
<div id="body_mid_bgpro">
<div id="prepro">
<!--bof Prev/Next top position -->
<?php if (PRODUCT_INFO_PREVIOUS_NEXT == 1 or PRODUCT_INFO_PREVIOUS_NEXT == 3) { ?>
<?php
/**
 * display the product previous/next helper
 */
require($template->get_template_dir('/tpl_products_next_previous.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_products_next_previous.php'); ?>
<?php } ?>
<!--eof Prev/Next top position-->

</div>
<div style="clear:both;"><br /></div>
<div id="proimg">
<!--bof Main Product Image -->
<?php
  if (zen_not_null($products_image)) {
  ?>
<?php
/**
 * display the main product image
 */
   require($template->get_template_dir('/tpl_modules_main_product_image.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_modules_main_product_image.php'); ?>
<?php
  }
?>
<!--eof Main Product Image-->
</div>
<div id="probanner"><img border="0" src="images/AdSpace2.jpg" /></div>
<div id="prorder">
<!-- Product order items start -->
<?php 
echo '<div id="nimship">Free Shipping on orders over <font color="#CC0000"> $75</font></div>';
?>
<!--bof Product Code   -->
<div id="pcoden">
<?php 
if (zen_get_products_code((int)$_GET['products_id']))
{
echo 'Product Code: ';
echo zen_get_products_code((int)$_GET['products_id']);
//echo 'LKSER1148';
}
?>
</div>
<!--eof Product Code  -->
<!-- purposely comented
<div class="cust_review">Customer Review<br><img src="includes/templates/hnb/images/star_5.png" width="60" height="12"></div> -->
<!--bof Product Price block -->
<div id="productPrices">

<?php
// base price
  if ($show_onetime_charges_description == 'true') {
    $one_time = '<span>' . TEXT_ONETIME_CHARGE_SYMBOL . TEXT_ONETIME_CHARGE_DESCRIPTION . '</span><br />';
  } else {
    $one_time = '';
  }
  //echo 'List Price: $4.99<br>';
  echo '<div class="price_lbl">Our Price:<font color="#CC0000">'.$one_time . ((zen_has_product_attributes_values((int)$_GET['products_id']) and $flag_show_product_info_starting_at == 1) ?
TEXT_BASE_PRICE : '') . zen_get_products_display_price((int)$_GET['products_id']).'</font></div>';
  //echo 'You Save: $1.00';
?>
<!--bof Add to Cart Box -->
<?php
if (CUSTOMERS_APPROVAL == 3 and TEXT_LOGIN_FOR_PRICE_BUTTON_REPLACE_SHOWROOM == '') {
  // do nothing
} else {
?>
            <?php
    $display_qty = (($flag_show_product_info_in_cart_qty == 1 and $_SESSION['cart']->in_cart($_GET['products_id'])) ? '<p>' . PRODUCTS_ORDER_QTY_TEXT_IN_CART . $_SESSION['cart']->get_quantity($_GET['products_id']) . '</p>' : '');
            if ($products_qty_box_status == 0 or $products_quantity_order_max== 1) {
              // hide the quantity box and default to 1
              $the_button = '<input type="hidden" name="cart_quantity" value="1" />' . zen_draw_hidden_field('products_id', (int)$_GET['products_id']) . zen_image_submit(BUTTON_IMAGE_IN_CART, BUTTON_IN_CART_ALT);
            } else {
              // show the quantity box
    $the_button = '<div id=atn>'.PRODUCTS_ORDER_QTY_TEXT . '<input type="text" name="cart_quantity" value="' . (zen_get_buy_now_qty($_GET['products_id'])) . '" maxlength="6" size="4" />' . zen_get_products_quantity_min_units_display((int)$_GET['products_id']) .zen_draw_hidden_field('products_id', (int)$_GET['products_id']) .'</div><div id="addtobtn">'. zen_image_submit(BUTTON_IMAGE_IN_CART, BUTTON_IN_CART_ALT).'</div>';
            }
    $display_button = zen_get_buy_now_button($_GET['products_id'], $the_button);
  ?>
  <?php if ($display_qty != '' or $display_button != '') { ?>
  
    <?php
     //echo $display_qty;
	 //echo '<br>';
     echo "<div class='cart_btn'>".$display_button."</div>";
     ?>
  <?php } // display qty and button ?>
<?php } // CUSTOMERS_APPROVAL == 3 ?>
<!--eof Add to Cart Box-->
</div>
<!--bof Reviews button and count-->
<?php
  if ($flag_show_product_info_reviews == 1) {
?>
<div id="productReviewLink" class="buttonRow back"><?php echo '<a href="' . zen_href_link(FILENAME_PRODUCT_REVIEWS, zen_get_all_get_params()) . '">' . zen_image_button(BUTTON_IMAGE_REVIEWS, BUTTON_REVIEWS_ALT) . '</a><br>'; ?></div>
<?php
}
?>
<!--eof Reviews button and count -->

<div style="clear: both;"></div>

<!--bof Reviews write-->
<div class="rwn"><?php echo '<a href="' . zen_href_link(FILENAME_PRODUCT_REVIEWS_WRITE, zen_get_all_get_params(array('reviews_id'))) . '">' . zen_image_button(BUTTON_IMAGE_WRITE_REVIEW, BUTTON_WRITE_REVIEW_ALT) . '</a>'; ?></div>
<!--eof Reviews write-->

<!--eof Product Price block -->


<!--bof free ship icon  -->
<?php if(zen_get_product_is_always_free_shipping($products_id_current) && $flag_show_product_info_free_shipping) { ?>
<div id="freeShippingIcon"><?php echo TEXT_PRODUCT_FREE_SHIPPING_ICON; ?></div>
<?php } ?>
<!--eof free ship icon  -->

<!--bof Quantity Discounts table -->
<?php
  if ($products_discount_type != 0) { ?>
<?php
/**
 * display the products quantity discount
 */
 require($template->get_template_dir('/tpl_modules_products_quantity_discounts.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_modules_products_quantity_discounts.php'); ?>
<?php
  }
?>
<!--eof Quantity Discounts table -->
<!-- Product order items end -->
</div>

<!--bof Form start-->
<?php echo zen_draw_form('cart_quantity', zen_href_link(zen_get_info_page($_GET['products_id']), zen_get_all_get_params(array('action')) . 'action=add_product'), 'post', 'enctype="multipart/form-data"') . "\n"; ?>
<!--eof Form start-->

<?php if ($messageStack->size('product_info') > 0) echo $messageStack->output('product_info'); ?>
<div id="prodetails">
<!-- bof click to enlarge -->
<?php require(DIR_WS_MODULES . zen_get_module_directory(FILENAME_MAIN_PRODUCT_IMAGE)); ?> 
<script language="javascript" type="text/javascript"><!--
document.write('<?php echo '<div id="tf"><a href="javascript:popupWindow(\\\'' . zen_href_link(FILENAME_POPUP_IMAGE, 'pID=' . $_GET['products_id']) . '\\\')"><br /><span class="imgLink"><img src="includes/templates/hnb/images/enlarge.gif" /></span></a>'; ?>');
//--></script>
<noscript>
<?php
  echo '<a href="' . zen_href_link(FILENAME_POPUP_IMAGE, 'pID=' . $_GET['products_id']) . '" target="_blank">' . zen_image($products_image_medium, $products_name, MEDIUM_IMAGE_WIDTH, MEDIUM_IMAGE_HEIGHT) . '<br /><span class="imgLink">' . TEXT_CLICK_TO_ENLARGE . '</span></a>';
?>
</noscript>
<!-- end of click to enlarge -->

<!--bof Tell a Friend button -->
<?php 
  if ($flag_show_product_info_tell_a_friend == 1) { ?>
<?php 
echo '<img src="includes/templates/hnb/images/seperater_tell_friend.gif" />';
echo ($flag_show_product_info_tell_a_friend == 1 ? '<a href="' . zen_href_link(FILENAME_TELL_A_FRIEND, 'products_id=' . $_GET['products_id']) . '">' . zen_image_button(BUTTON_IMAGE_TELLAFRIEND, BUTTON_TELLAFRIEND_ALT) . '</a></div>' : ''); ?>
<?php
  }
?>
<!--eof Tell a Friend button -->
<br>
<!--bof Product Name-->
<h1 id="productName" class="productGeneral"><?php echo $products_name; ?></h1>
<!--eof Product Name-->
<!--bof Product description -->
<?php if ($products_description != '') { ?>
<?php echo stripslashes($products_description); ?>
<?php } ?>
<!--eof Product description -->
</div>

<div id="lastbtn" >
</div>
<!--bof Form close-->
<div style="clear:both"></div>
</form></div><div id="body_mid_bottompro"></div><!--bof also purchased products module--><br>
<?php require($template->get_template_dir('tpl_modules_also_purchased_products.php', DIR_WS_TEMPLATE, $current_page_base,'templates'). '/' . 'tpl_modules_also_purchased_products.php');?>
<!--eof also purchased products module-->
</div>
<div id="mid_bottom"></div>
Thanks in advance!