[1][2] Gameplay in Zarahemla is nearly identical to the original, with several major differences - most notably, the game has been modified to suit two-player play as part of its official rules.
[1][2] Unlike Catan, however, Zarahemla's hexes are placed on a fixed board, which itself contains the game's harbours, or trading posts.
The mini expansion was originally available by submitting the email addresses of friends who might be interested in buying The Settlers of Zarahemla to either Überplay or Inspiration Games; the cards would then be sent by mail.
[2] The player with the greatest contribution (of at least three stones) to the Temple receives two victory points, which are given out akin to the Largest Army or the Longest Trade Route in Catan.
However, it did work, and I may well play a Catan game with two players again, using the fast setup suggested here (three settlements and roads instead of two).