Really? You're complaining less than two hours after your initial post? Maybe your time would be better spent using Google to search for the answer, if it's that critical, rather than insulting the all-volunteer community who are developing and supporting Ubercart. There are literally hundreds of examples of how to write a checkout pane out there. Why don't you give it a try and ask for help if and only if there's something specific that doesn't work for you? If you can write a checkout pane, adding an image is trivial, which leads me to believe you haven't even tried.
And BTW, speaking for myself, it was 7AM here when you first posted. Not everyone lives in the same time zone as you or works the same hours as you, especially since we are volunteers working in our spare time.