I spent hours struggling with the iPhoto structure, assuming it was like the traditional hierarchical file tree. It was only when I understood that photos were assigned "an event" and that I would link back to those, and consequently doing copying, cutting, pasting in Albums, that I could move on and catalog and arrange my image collection. For me, the label "event" is counter-intuitive and slowed down my learning of iPhoto. Does anyone know why Apple might have chosen that word? Just curious.