If u want to hide the numbers, only pick 8, 7 and 0 and open them into your paint program, in gimp u have to set the alpha threshold to 255 and save them with the right compression and thats it.
With paint.net I have no idea how to change the threshold, maybe for this u ask Buzz, because he knows the program very well.
If u use Adobe PS, I think I can remember on days I used it, it was the same way like in gimp.
But be careful, if u change the alpha threshold only for the numbers on the side, u have to mark only these numbers and edit the aplha threshold to 255.
(or 0) Hope this helps.
About the repaint, yes it looks very nice.
