Magento : Show guest name in last 5 orders magento admin dashboard

Show guest name in last 5 orders magento admin dashboard

On the magento community admin dashboard, Under "Last 5 orders" if there is an order by guest it doesnot show the name of guest customer. There were many instances when my clients wanted to show the names of guest too.
For this i have some suggestions. We can show the name from billing address there instead of the customer name. If you think my suggestion is feasible, i request to add this modification to the coming release of magento.
I have coded for this
In Mage/Adminhtml/Block/Dashboard/Orders/Grid.php about line '51' replace "->joinCustomerName('customer')"  with ->joinCustomerBName('customer')
and  in Mage/Reports/Model/Resource/Order/Collection.php

 add a function
 public function joinCustomerBName($alias = 'name')
    {
        $fields      = array('t2.firstname', 't2.lastname');
        $fieldConcat = $this->getConnection()->getConcatSql($fields, ' ');
        $this->getSelect()
        ->join(array('t2' => 'sales_flat_order_address'),'main_table.billing_address_id = t2.entity_id')->columns(array($alias => $fieldConcat));
       

        return $this;
    }