Well, about a month and a half ago, i was taught this by a friend of mine and thought it was cool, so i will share it with everyone else here

Ok abviously, the first step is to open an existing document, or use the sig that you made...

second step) Create a new Layer (CTRL+Shift+N) or go to Layer-->New-->Layer

third step) make the foreground black, and the background white (or just hit D)

fourth step) go to Select-->All or just hit Ctrl+A so the entire image is seleted

fith step) go to Edit-->Stroke and apply these settings: Width: 3px Color: Black Location: Inside Mode: Normal Opacity: 100%

sixth step) once again go to Edit-->Stroke and apply these settings: Width: 2px Color: White Location: Inside Mode: Normal Opacity: 100%

seventh step) once again go to Edit-->Stroke and apply these settings: Width: 1px Color: Black Location: Inside Mode: Normal Opacity: 100%

eighth step) change the blending mode from normal, to Overlay


ninth step) you're done!

and although this is a bad sig....lol i used the border on this and even though you can barley see it (atleast i cant) here was my final result