Okay, just found this on the Dallas Cowboys stadium website:
U2 Concert Information
Monday, October 12, 2009
9:00am Early Parking Opens - Lot 13 ONLY
(Cash and Passes Accepted)
9:00am Early Line-Up Opens (GA Floor) -
Outside West Plaza - Designated Line Only
3:30pm Cowboys Stadium Parking Lots Open
5:00pm Plazas Open & Stadium Opens
(Plaza Access Requires Event Ticket)
7:00pm Concert Begins