OMG, that's HILARIOUS!

Repertorizing in a pretty lengthy process. Basically you create a chart using rubrics specific to homeopathy. You describe all symptoms, where they are felt, what they are like and what makes them better or worse. Each is assigned a number based on it's importance.
So, for instance someone with gas might look like this:
Head: Face flushed (3)
Digestion: Abdomen-stabbing pain left (2)
Abdomen-bloated (1)
Abdomen-colic, incarcerated (1)
General: feel worse at night (agg.)
worse lying down (agg.)
better in the cool (amel.)
Mind: anxious (1)
Then, using a materia medica you'd match up each symptom with all the remedies that go along with it.
After that you have a chart with remedies on the top and symptoms on the side. You make an "x" each time a remedy fits with a symptom. At the end there will be only one or two remedies that have more "x's" in their columns than the rest. The one with the most wins, and if there's a tie you look more deeply at the top two or three.
That was probably totally confusing, but you get the picture!