I downloaded ThemePark 4.1 so that I can create themes for my Mac with snow leopard. I saw an online video showing how to select icons and send them to Photoshop for editing. Unfortunately, I do not have Photoshop. Instead, I have Corel Painter and Pixelmator. Is there a way to have the button that says "Send to Photoshop" actually send the images to Pixelmator? If not, what other method(s) can I use to edit the images?