Get product Description on order in magento

For backend order:


/test/app/design/adminhtml/default/default/template/sales/order/view/items/renderer/default.phtml



add lines after first td closed:-
<td><?php $custom2=Mage::getModel('catalog/product')->load($_item->getId());
echo $custom2->getDescription();
?>
</td>


/test/app/design/adminhtml/default/default/template/sales/order/view/item.phtml


after the line  <th><?php echo $this->helper('sales')->__('Product') ?></th>


add the line:
<th><?php echo $this->helper('sales')->__('Product Description') ?></th>



For frondend order In my account:
/test/app/design/frontend/base/default/template/sales/order/items/renderer/default.phtml
add this line after first td close

<td><?php $custom2=Mage::getModel('catalog/product')->load($_item->getId());
echo $custom2->getDescription();
?> </td>



/test/app/design/frontend/base/default/template/sales/order/item.phtml

after line this "  <th><?php echo $this->__('Product Name') ?></th>"

add the lines:
<th><?php echo $this->__('Product Discription') ?></th>


For cart page in frountend:

/app/design/frontend/base/default/template/checkout/cart/item/default.phtml

<td><?php $custom2=Mage::getModel('catalog/product')->load($_item->getId());
echo $custom2->getDescription();
?> </td>


/app/design/frontend/base/default/template/checkout/cart.phtml
  <th rowspan="<?php echo $mergedCells; ?>"><span class="nobr"><?php echo $this->__('Product Description') ?></span></th>