Add BP requisition items to existing PO

We want to add BP requisition items to an existing PO but our interface only shows POs with a status of "New" on the GP backend.  Does anyone know how to get more than just the "New" status POs on the list when adding requisition items to existing POs?  We are running GP 2010 and do not have Commitments enabled in GP.

Any help is greatly appreciated!!

Dave