Magento Add Shipment-status Column To Shipment Grid

Add the “shipment_status” column from sales_flat_shipment to the shipment grid (Sales->Shipments)

1. The DB will have a numeric value in “shipment_status” that shows the status – i.e. 1=delivered Null=un-delivered, 2=returned etc.
2. This status number has to be enumerated to show the actual status – ie. 1=delivered Null=un-delivered, 2=returned

Don’t need any admin interface – just the php and xml override file.

Thanks

PS: Magento 1.4.2