_prepareColumns() I have added:
$this->addColumn('brand', array( 'header' => Mage::helper('sales')->__('Brand'), 'width' => '80', 'index' => 'brand' ));
I now have the Brand ID in the Sales Order Create Grid.
However I want to see the brand name rather than ID (The brand is a dropdown within admin).
How do I display the option value rather than ID? ie. "Brand Name" rather than "47"