Is it possible to generate all 5 states from a single "unselected" sample. Be aware, these button icons could be in a non-rectangular form (just like standard back/forward buttons with triangular tip), so the "selected" state should have a line until dark-to-white or dark-to-transparent edge to match image shape.
Sample from http://www.youtube.com/watch?v=2jCVmfCse1E