Configure Photogates for Collision Timing (SPARKvue)

How do I configure photogates within SPARKvue? Using the Digital Adapter (PS-2159) photogates can be connected to your PASPORT interface. If you are using the 550 interface, the photogates can be used in digital ports 1 and 2 directly.
www.pasco.com/prodCompare/pasport-adapters/index.cfm
www.pasco.com/prodCatalog/UI/UI-5001_550-universal-interface/index.cfm