OK, I am awful with PSP...but I have used PSP7 in the past a little.  Anyway, I have a bunch of pictures I want to crop, but I want to crop circles out them.  Basically, I have photographed part of my coin collection and would like to crop the coins out and copy them onto a black background...but I can't figure out how to crop a circle.  Any help would be very much appreciated.  Thanks!