I want to use the base image from the "Viper" Theme that comes with the zip file. When I go into theme edit, it shows that it uses a .png file, however I can't find the file anywhere. I assume that it's compressed into the .turtheme file, but I don't know how to extract just the .png image. I am trying to customize my own theme and work off the image in the "viper" theme. Any help is greatly appreciated.