I'm sorry, hon, you can't. You can only open rendered image files--.JPG, .TIF, .BMP--files in Photoshop. So, you fix up your figure, get it just right, render it (it's like taking a photo), and export the render to an image file. Then open up that picture (JPG, TIF, BMP & such) in Photoshop. Is this any clearer? What are you trying to do?