From the introduction:
N1: Against the Cult of the Reptile God has been re-scaled to Dungeons & Dragons (3rd Edition) for any four characters of 2nd level (the original is slated for 4-7 characters of 1st to 3rd level, so very little change was required). NPCs, creatures, and encounters have been modified in levels or in number to accommodate this challenge rating. But the DM can easily alter the number and/or toughness of monsters to suit their players’ group’s needs. As well, I have altered (read: reduced) treasures to 3E standards and have often turned them into what I hope are more believable and/or interesting forms. Other incidental details or explanations do appear throughout of course, feel free to adjust or dismiss anything that doesn’t work in your campaign.