In essence, here's what she does:
1) First, attach the screws, washers and fasteners to the cross-arm. Note: You do this first, which you can do inside while watching the candidates debate on CNN in the evening (another time saver)
2) Then you slip the cross arm over the top of the stake (not an easy thing to do when you're barely 5' tall and the top of the stake is 8' above the ground).
3) Then just tighten up the screws, and you're good to go. (No, she didn't use the electric powered screw driver that the workers were so proud of, which somehow took them hours to do what she was able to do in minutes).