Display the OutofStock configurable products in the frontend - Magento

Display the OutofStock configurable products in the frontend

Go to - app\code\core\Mage\Catalog\Block\Product\View\Type\ Configurable.php

Find the following function -

public function getAllowProducts()
    {
        if (!$this->hasAllowProducts()) {
            $products = array();
            $skipSaleableCheck = Mage::helper('catalog/product')->getSkipSaleableCheck();
            $allProducts = $this->getProduct()->getTypeInstance(true)
                ->getUsedProducts(null, $this->getProduct());
            foreach ($allProducts as $product) {
                if ($product->isSaleable() || $skipSaleableCheck) {
                    $products[] = $product;
                }
            }
            $this->setAllowProducts($products);
        }
        return $this->getData('allow_products');
    }


Replace with -

public function getAllowProducts() {
        $allProducts = $this->getProduct()->getTypeInstance()->getUsedProducts();
        $this->setAllowProducts($allProducts);
        return $this->getData('allow_products');
    }