Noob question about using an image as a "blueprint"


I have 4 images that I would like to use as a backdrop/blueprint while I’m trying to model. Each image is the object from front, top, back and side view. All those images are of the right size for their purpose.

My question is: Do I have to create 4 planes and apply those images as a texture and position them accordingly in perspective view or is there an easier way to do this?

Thank You for your time.

There is the background option. Note they only show in the set views and in orthographic view (toggle between perspective and orthograp;hic view with numpad 5)

Thanks! That CGCookie vid explain it really nice.