I have almost 40 GBs of little avi movies from my camera in iPhoto - and I know that if those were saved as mp4's instead, that I'd probably save a lot of space on my drives.



But the problem is - there's no easy way, that I can think of, to take the movies I have in iPhoto now, replace them with newly exported mp4's and put back in the same spot retaining all their info. Does anyone have a way to do this?