I want to setup a photo booth for a friends wedding. I'm looking for software that will work with my canon 30D connected to my MBP. The idea is that the guess can press a button that triggers the camera. Using the canon software I can save the file to a folder on my MBP. I'm looking for software that will watch this folder and when a picture appears prints the picture on my epson printer, maybe even printing 4 images as thumbnails on a 4" x 6" photo paper.