Using Photoshop CS3, I started with a bland shot of a pumpkin exhibit at the Dallas Arboretum. I added a "moon" and used curves and levels to give everything a night effect. I downloaded clip art images of jack-o-latterns from the internet and selected just the features like eyes and mouth and pasted them onto the pumpkins. This was an interesting excercise in compositing. Not difficult but time consuming. Made a nice Happy Halloween greeting card.