simple question:
I just want to have an extra product, including options for color and a fix price, in the checkout page? What is the best way to do this?
Any ideas?
You will have to edit one of the files of the view "checkout" via the menu Display->Views and add an HTML dropdown with a button with some javascript to trigger the add to cart HTML URL of your extra product (you can find it with the button at the top of the product edition page with you edit that product).
