Hi,
I just added the folder with the reference images and the scene files to part 1 so if you redownload this part it's there now my apologies. The one he uses on the image plane is called "Jerry Cans 1" and the image plane is set up in side view. He doesn't show how to set up the image plane with the tutorial, but if you want to see a video on how to do this you can watch part 1 of this tutorial which is a free part showing image plane set up in Maya, just use the jerry can image instead.

Good luck with the tutorial,
Nilla