Here is how we did it. I pulled the reflector off of my Quantum T5d showing only the bare bulb. Next, I borrowed some notebook paper from one of the students to wrap around the flash tube as you can see in this first image.
This basically created a new light source with a very narrow beam of light. The "tricky" part was getting the "snoot" light pointed properly to create the "Hollywood" lighting pattern I wanted on my bride's face. My "Hollywood" lighting pattern is simply a variation of the classical "Rembrandt" lighting that artists and photographers have been using for years. Shellee, my assistant on the shot, positioned the flash so she could not see the far side of the bride's nose - so neither could the light she was holding, but she could still see plenty of the far side of the bride's cheek - and so could the light. Check out the second image.
Now if the light was held in the position described above, we should see an image of our bride with the dramatic, hard shadowed, directional light on her face, with the light falling off quickly over the rest of the scene to drive the viewer's attention easily to our bride's face. I think the resulting image does just that. Pretty cool, I think. --Enjoy.