I'm no court patcher, but i know that as long as you don't want to change the color of the paint on the court its pretty simple to edit graphics. all you need is the nfshtool and a fair amount of patience. let me know if this helps.
Ok, so I'm not an artist, so I don't have the exact colors, or the woodgrain, or so it's not to scale. It's meant to be a rough sketch, obviously it's not intended to be a screenshot!