Make “out of stock” products always show up at the end of every categories page

Hello friends,

app\code\core\Mage\Catalog\Block\Product\List.php (line 86)

$this->_productCollection = $layer->getProductCollection();

replace by

$this->_productCollection = $layer->getProductCollection()->joinField(‘inventory_in_stock’, ‘cataloginventory_stock_item’, ‘is_in_stock’, ‘product_id=entity_id’,’is_in_stock>=0′, ‘left’)->setOrder(‘inventory_in_stock’,’desc’);

and you are done.

Thanks,
Jignesh