Terribly annoying speaker, but very good tutorial about how to create a photoshop action to add a watermark. I'll create a simple action for you if you send me the text (text only, sorry) and tell me if you want it in the corner (which one), top or bottom of you picture.
http://av.adobe.com/russellbrown/BrandingSM.mov
Send me a PM if you can't do it after watching the movie.