Replace default price template in product view

gistfile1.txt

class Store_Core_Block_Catalog_Product_View_Type_Simple extends Mage_Catalog_Block_Product_View_Type_Simple{
    protected $_priceBlockDefaultTemplate = 'catalog/product/matched-price.phtml';

    protected function _getPriceBlockTemplate($productTypeId)
    {
        if (isset($this->_priceBlockTypes[$productTypeId])) {
            if ($this->_priceBlockTypes[$productTypeId]['template'] != '') {
                return $this->_priceBlockTypes[$productTypeId]['template'];
            }
        }
        return $this->_priceBlockDefaultTemplate;
    }
}