@rinigus
I'm a shutterbug, not a professional designer. So no, it's not a vector graphic but a bitmap made with gimp. If a vector graphic is needed, I have to look how to convert it. Otherwise I have to redraw it, but that would take it's time, because I'm not used to vector graphics.

Anyway i need to know for which icon you have decided (the last one is my favorite in the meantime).

A transparent 2 bit layer for the cover shouldn't be a problem.