public function prepareForCartAdvanced(Varien_Object $buyRequest, $product = null, $processMode = null) { if (!$product) { $product = $this->getProduct(); } $prepare = Mage::helper('payperrentals/rendercart')->prepareForCartAdvanced($buyRequest, $product, $processMode, 'bundle'); if ($prepare == 'call_parent') { return parent::prepareForCartAdvanced($buyRequest, $product, $processMode); } else { return $prepare; } }