Here is how they work together:
First, if you look at the outside border of the banner you will see a white border. This is invisible space on a png file. That white border is only there because the image is jpeg. OOTP Forums only permits a certain amount of pixels for a png. Anything larger causes the forums convert the image to jpeg. So if you wanted the png without the white border I would have to email to you. See below of an example of a resized png showing that there really is not a white border. You will also notice that when the image converts from png to jpeg it becomes dostorted and blurry. The png of that file is pretty crisp.
I have a template so knocking out all of the others would only take minutes if this is something that you would like. Let me know if you want changes.
See no white border:
