The easiest way is to get the new photshop :P

Yes, finally, at version 13, in Photoshop CS6 Beta each Shape can have a Stroke!! and it can be dashed... took them 13 versions of photoshop but they finally came round to it :)

Beware! Its still beta :P But its free for a month or so...

http://labs.adobe.com/technologies/photoshopcs6/

P.S. - It also has lots of new great stuff... moves kind of slow on my laptop, but still.. i recommend it, have a look at these videos to see the new stuff it has:

http://www.lynda.com/Photoshop-tutorials/Photoshop-CS6-Beta-Preview/97406-2.html

The easiest way is to get the new Photoshop

Yes, finally, at version 13, in Photoshop CS6 each Shape can have a Stroke. It can be dashed... took them 13 versions of Photoshop but they finally came round to it

P.S. - It also has lots of new great stuff. Moves kind of slow on my laptop, but still.. I recommend it, have a look at these videos to see the new stuff it has:

http://www.lynda.com/Photoshop-tutorials/Photoshop-CS6-Beta-Preview/97406-2.html