Here's another interesting thing you may want to add to your skin editor mr twit - in the memory dump, along with the list of bmp names is an extra bmp called bar2.bmp. It seems that this is related to an extra field in skin.cfg called brightness. When you change the brightness, this bmp will move according to whatever all those figures in skin.cfg mean . To test I just copied the bar line, renamed to brightness, and kept the figures the same, which gave me an extra bar graphic moving along the same path as the progress bar. The only problem is the brightness bar doesn't move in real time when the interface is shown (I suppose because the brightness doesn't change until the interface is removed), but you can force it to move if you change the brightness then ff or rew.