I was using my boyfriend's macbook pro to create a slideshow to send to family members. The file was too big to email so I dragged a couple photos to the desk top to copy them and then deleted them off iphoto. When I was done with the slide show I dragged/copied them back to iphoto and then deleted them off the desk top. I was able to view his photos when I was done, but later when he got home I tried to go to iphoto to show him the slideshow and iphoto would not load. There is a gray screen with a white wheel spinning(not the beach ball). We sat there and tried to let it load for a while and it never did, we tried restarting the computer,updating to iphoto '11, and pushing alt+command button. Nothing is working! I feel really bad, and would like to get this problem resolved. I appreciate any advice!