Automatically adding a black border for multiple pics

I've been using Photoshop for a while now, and have found a few actions and scripts for adding frames and borders to a single pic. However, I've started doing "series" shots, displaying 3 pictures in a sequence. I have been adding simple borders manually, like this:



(these three pics have nothing to do with each other, besides the fact that I took them and use them as wallpapers for my cell phone They are just here for illustration's sake.)

The process is simple, yet boring and tedious. Is there a way to automatically select multiple files and have PS ass a border like the one shown above, be it an action, a script or whatever? If possible, I'd like to select border width, color and maybe add a caption below each pic/all pics.