Add an App to every "Open With" Menu?

Is there any way I can make it so one specific app always shows up in the "Open With" menu, in addition to all of the default options? I want to be able to right-click on a file, and in addition to seeing all of the normal apps that open it, I also want to be able to choose something like BBEdit, so I can also view the raw code. Maybe the approach should be reversed, is there a way I can tell the system that BBEdit is a valid app to open *every* file type? This would be a very handy, time-saving mod.