Modify WooCommerce "Customer Product Designer" Plugin

Hello, my client will create own skins without selling process ( cart, checkout, .. ). He will add all images in the difference Category on Menu "Arts" ( see Attachement ) Random-Function: 1. Add "Random-Button" 2. If you click the 'Random'-Button, then take 1 "random Item" from "each Category" and show it on shirt 3. Add "Sticky-function" for each Layer. ( make a pin on each layer when i click it then hold this item and change only the other things when i click 'random-button' again. "Store it & Download"-function: 1. Add "Store it & Download"-Button 2. My client will create the skins and store it. But each Design can only store once, it must be unique. Means, you can create the skin but you cant store it again. I think you can leave the whole process as it is. You need only hide cart and checkout process. As soon as you click store it, the order should be saved directly in WooCommerce Orders. When I click the button a window should appear with the message "The skin was successfully saved and downloaded as an image". Thanks & Best regards Sasha