make all configurable children search only in magento

<?php
include_once '../app/Mage.php';
Mage::app()->setCurrentStore( Mage_Core_Model_App::ADMIN_STORE_ID );

// Get the current page from $_GET
$curPage = intval(Mage::app()->getRequest()->getParam('page'));
$curPage = $curPage < 1 ? 1 : $curPage;

// Get all configurable and grouped products
$products = Mage::getModel('catalog/product')
    ->getCollection()
    ->addAttributeToSelect('name')
    ->addAttributeToFilter('type_id', array('in' => array('configurable', 'grouped')))
    ->setPageSize(100);

$curPage = $curPage > $products->getLastPageNumber() ? $products->getLastPageNumber() : $curPage;
$products->setCurPage($curPage);

printf("Processing page %s of %s<br/>", $curPage, $products->getLastPageNumber());

// Loop each configurable product
foreach ($products as $_product) {
    // Get the child products for this product
    if ($_product->getTypeId() == 'configurable') {
        $simpleProducts = $_product->getTypeInstance(true)->getUsedProductIds($_product);
    } elseif ($_product->getTypeId() == 'grouped') {
        $simpleProducts = $_product->getTypeInstance(true)->getAssociatedProductIds($_product);
    }
    printf("Setting children of Product ID %s<br/>", $_product->getId());
    // Loop each child product
    foreach($simpleProducts as $_simpleID) {
        try {
            // Set associated product as not visible
            $_simple = Mage::getModel('catalog/product')->load($_simpleID);
            $_simple->setVisibility(Mage_Catalog_Model_Product_Visibility::VISIBILITY_IN_SEARCH);
            $_simple->save();
            printf("Product ID %s saved as 'Not Visible Individually'<br/>", $_simple->getId());
        } catch ( Exception $e ) {
            print_r($e);
        }
    }
}