- Menu icons (Music file, contact info, etc.)
- Button icons (Back, delete, play)
- Button hilight masks
- Default Matrix Menu labels (Taken unmodified from the default skins)
It may be kind of odd that they're 256-color grayscale, but I have my reasons
These were pretty much automatically cut out and de-gradiented, so they may need some manual fixing, but they should function pretty well as masks for your own colors, gradients, or textures.
EDIT: Forgot the "Unknown01" icon and the pressed button highlight