FYI - one suggestion since I change the UI in my Star Wars mod.... I had a tough time at first, but what I ended up doing was making every background all white, then went into the game and saw how it looked after all the buttons were overlayed, etc. Then I just did a CTRL+Insert to take a screenshot, edited that, removed the buttons that had been overlayed, and re-saved it as a DDS. This worked well for me, but I have very minimal texturing skills, so you might be able to easily edit the UI without doing something like this...