how do i add a border in photo shop

sorry can someone help me quick, i need to roughly know how do i add a border in photo shop to a sig?

thank for ur time guys!

oh, ive got cs3. dont know if that will make a difference!

1.Make new layer on top of all the layers
2.Press Ctrl + A
3.Go to edit>Stroke
4.U can put how big the border is..(where it says pixels)
5.U can change the color and other stuff
6.Press ok i think or something like that
7.And there u have it

-or-

You can use the rectangle marquee tool [IMG]http://i238.photobucke*****m/albums/ff303/colby1666/RectangleMarqueeTool.jpg[/IMG] to select a rectangular area and fill it in with the paint bucket. This way of doing it is usually used when making cinematic boarders.