Please help. When I transfer videos from my iPhone 3GS to iMovie the clips are flattened out like the aspect ratio is all wrong. I don't know how to fix this. Obviously I've taken the videos with the iPhone in the vertical position and I would have to crop them to get them to fit into iMovie's 4:3 ratio, but how do I do this? Right now the clips shown in iMovie's viewing window are very flattened out from top to bottom. Thanks much.