By: kelbytv.com/photoshopkillertips/
This option under the paths palette will allow you to add and edit a stroke to a path.
http://kelbytv.com/photoshopkillertips/2010/04/30/stroke-path-with-brush/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+PhotoshopKillerTips+%28Photoshop+Killer+Tips+%28Video%29%29