The imovie tutor for iMac app still crashes. It's almost like a video processor isn't working properly or video accelerator? I have no idea what the actually terminology is...but something like that. What I need to find out (regarding the iMovie tutor app) is what program is opened when I open the app. Would it be quick time?
As for iphoto, your suggestion of deleting it and reinstalling it sounds like a plan...just need a disk i guess.