I have iPhoto `08 (7.1.5). It uses non-destructive editing. It was raining the other day so I bought some flowers and photographed them against a while background in my apartment. Unfortunately, I wasn`t able to prevent bits of dust and the like from landing on the card. So I have a bunch of white backgrounds with little but noticeable blemishes. I used iPhoto`s retouch tool to clear them. No problems there. But now, those photos load up really slowly because of the time the program is taking to re-apply the changes every time I open them. So I`d like to know if there`s a way to selectively apply destructive editing in iPhoto to get around the slow loading times.