Create a user account in Drupal 6 programmatically

require_once './includes/bootstrap.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
 
$user_name = 'my_name';
$email = 'my_name@domain.com';
...
 
$fields = array(
   'name' => $user_name,
   'mail' => $email,
   'pass' => $user_password,
   'status' => 1,
 
   );
$account = user_save('', $fields);
 
if ($account != NULL ) {
  echo "user Id: $account->uid";
$profile_node = content_profile_load('bio', $account->uid, true);
 
if ($profile_node != NULL) {
    echo "node Id: $node_ref->nid";
    return array(
        0 => array('nid' => $profile_node->nid ),
        // 0 => array('USER ONE' => $user_data->field_last_name[0]['value']),
    ); 
    //it's a published node, 0 if it's un published
    $profile_node->status = 1;
    $profile_node->title = $account->name;
    //1 is promote to home page, 0 is not to promote on home page
    $profile_node->promote = 0;
    $profile_node->uid = $account->uid;
    $profile_node->format = 1; //filtered HTML
    $profile_node->field_emp_id[0]['value'] = '55555';
    $profile_node->field_first_name[0]['value']= 'user1';
    $profile_node->field_last_name[0]['value'] = 'USER ONE';
    $profile_node->field_title[0]['value']= 'Engineer';
 
    if ($profile_node = node_submit($profile_node)) {
        //saves the node
        node_save($profile_node);
     }
 
else {
    echo " no user data found!";
}
}