I used a similar method to what mixProtocol described earlier in the thread, but with a couple of differences:
1) Clean the boots with a horse hair brush. You may need to clean them a bit more thoroughly if the boots have been worn.
2) Apply a leather conditioner (I used Allen Edmonds conditioner cleaner). Let the boots sit for an hour.
3) Using a shoe polish dauber (or cotton cloth), apply a small amount of shoe cream. Work in the cream using circular motions. Work...