I found a template to incorporate my WordPress template around my zen-cart store. There have been some glitches which I am massaging out. The latest one is that the html_header.php (in the MY_TEMPLATE/common folder) seems to be blocking code loading from modules/pages/index. I am trying to install the slider from Kerrin Hardy's tutorial.

If I delete the html_header.php from the template the slider code from the index folder loads in the header. But with the custom html_header.php it doesn't.

Any suggestions as to why html_header.php might be circumventing the pages code from loading would be appreciated.

PHP Code:
<?php
/**
 * Common Template
 *
 * outputs the html header. i,e, everything that comes before the \</head\> tag <br />
 * 
 * @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: html_header.php 6948 2007-09-02 23:30:49Z drbyte $
 */
 
/**
 * load the module for generating page meta-tags
 */
require(DIR_WS_MODULES zen_get_module_directory('meta_tags.php'));

// turn off WordPress themes and include the WordPress core:
define('WP_USE_THEMES'false);
define('IN_ZENCART'true);
require(
'../wp-blog-header.php');
$template = new template_func(DIR_WS_TEMPLATE);

function 
zen_head(){
    global 
$template$current_page_base;
    echo 
'<!-- BEGIN ZenCart Additions -->' "\n";
    
// load all template-specific stylesheets, named like "style*.css", alphabetically
    
$directory_array $template->get_template_part($template->get_template_dir('.css',DIR_WS_TEMPLATE$current_page_base,'css'), '/^style/''.css');
    while(list (
$key$value) = each($directory_array)){
        echo 
'<link rel="stylesheet" type="text/css" href="' $template->get_template_dir('.css',DIR_WS_TEMPLATE$current_page_base,'css') . '/' $value '" />'."\n";
    }
    
// load stylesheets on a per-page/per-language/per-product/per-manufacturer/per-category basis. Concept by Juxi Zoza.
    
$manufacturers_id = (isset($_GET['manufacturers_id'])) ? $_GET['manufacturers_id'] : '';
    
$tmp_products_id = (isset($_GET['products_id'])) ? (int)$_GET['products_id'] : '';
    
$tmp_pagename = ($this_is_home_page) ? 'index_home' $current_page_base;
    
$sheets_array = array('/' $_SESSION['language'] . '_stylesheet'
                        
'/' $tmp_pagename
                        
'/' $_SESSION['language'] . '_' $tmp_pagename
                        
'/c_' $cPath,
                        
'/' $_SESSION['language'] . '_c_' $cPath,
                        
'/m_' $manufacturers_id,
                        
'/' $_SESSION['language'] . '_m_' . (int)$manufacturers_id
                        
'/p_' $tmp_products_id,
                        
'/' $_SESSION['language'] . '_p_' $tmp_products_id
                        
);
    while(list (
$key$value) = each($sheets_array)) {
        
$perpagefile $template->get_template_dir('.css'DIR_WS_TEMPLATE$current_page_base'css') . $value '.css';
        if (
file_exists($perpagefile)) echo '<link rel="stylesheet" type="text/css" href="' $perpagefile .'" />'."\n";
    }
    
    
// load printer-friendly stylesheets -- named like "print*.css", alphabetically
    
$directory_array $template->get_template_part($template->get_template_dir('.css',DIR_WS_TEMPLATE$current_page_base,'css'), '/^print/''.css');
    
sort($directory_array);
    while(list (
$key$value) = each($directory_array)) {
        echo 
'<link rel="stylesheet" type="text/css" media="print" href="' $template->get_template_dir('.css',DIR_WS_TEMPLATE$current_page_base,'css') . '/' $value '" />'."\n";
    }
    
    
// load all site-wide jscript_*.js files from includes/templates/YOURTEMPLATE/jscript, alphabetically
    
$directory_array $template->get_template_part($template->get_template_dir('.js',DIR_WS_TEMPLATE$current_page_base,'jscript'), '/^jscript_/''.js');
    while(list (
$key$value) = each($directory_array)) {
        echo 
'<script type="text/javascript" src="' .  $template->get_template_dir('.js',DIR_WS_TEMPLATE$current_page_base,'jscript') . '/' $value '"></script>'."\n";
    }
    
    
// load all page-specific jscript_*.js files from includes/modules/pages/PAGENAME, alphabetically
    
$directory_array $template->get_template_part($page_directory'/^jscript_/''.js');
    while(list (
$key$value) = each($directory_array)) {
        echo 
'<script type="text/javascript" src="' $page_directory '/' $value '"></script>' "\n";
    }
    
// load all site-wide jscript_*.php files from includes/templates/YOURTEMPLATE/jscript, alphabetically
    
$directory_array $template->get_template_part($template->get_template_dir('.php',DIR_WS_TEMPLATE$current_page_base,'jscript'), '/^jscript_/''.php');
    while(list (
$key$value) = each($directory_array)){
        
// include content from all site-wide jscript_*.php files from includes/templates/YOURTEMPLATE/jscript, alphabetically.
        // These .PHP files can be manipulated by PHP when they're called, and are copied in-full to the browser page
        
require($template->get_template_dir('.php',DIR_WS_TEMPLATE$current_page_base,'jscript') . '/' $value); echo "\n";
    }
    
// include content from all page-specific jscript_*.php files from includes/modules/pages/PAGENAME, alphabetically.
    
$directory_array $template->get_template_part($page_directory'/^jscript_/');
    while(list (
$key$value) = each($directory_array)) {
        
// include content from all page-specific jscript_*.php files from includes/modules/pages/PAGENAME, alphabetically.
        // These .PHP files can be manipulated by PHP when they're called, and are copied in-full to the browser page
        
require($page_directory '/' $value); echo "\n";
    }    
    echo 
'<!-- END ZenCart Additions -->';
// function zen_head
add_action('wp_head','zen_head');
get_header();
?>
<?php 
// NOTE: Blank line following is intended: ?>