I found the way to make a good border so follow me. a. First, create a layer above everything(Make sure it is on top. Mine isnt on top but put your there. b. Then, CTRL+A>select all c. edit>stroke d. Now first have color black with a 3pxl boarder. hit ok e. Now Stroke again f. Now this time do a 2pxl boarder and under mode click clear. hit ok g. Now do another stroke h. Now this time do 1pxl and have it black with the mode of normal again. Hit ok Here are my results Hope this helps. This is my first tut by the way.
on the pixel part you can make the color white the do the black 1px then zoom in get magic wand and select the white then delete it but your way is simpler