All instructions are in the annotations as I don't have a mic now.
If you want to make the black outline just open the image in Gimp when you have created the torn paper border, select the layer and select alpha to selection, go to select - grow and put 1-3 pixels, and fill it up with black. Simple?
If you want to make the black outline just open the image in Gimp when you have created the torn paper border, select the layer and select alpha to selection, go to select - grow and put 1-3 pixels, and fill it up with black. Simple?