When I download a photo from my camera to my iMac, the iMac gives the photograph a generic name. I have been trying to rename some of my photographs in iPhoto. (Very frustrating!) I have renamed them while in the 'information' window and I have renamed them by clicking on the name in the 'album' window but when I go to attach it to an email (for example) the old name is still on the photograph. How do you rename a photo and have it 'stick'?