First, bigmeat, extract all files to the same folder, then click on World 2004 v1.1. Then some fun installation stuff will happen. Make sure that, in the Conquests folder (Which is in the Conquests folder for some reason.) you can see the editable file World 2004 v1.1, and an additional folder called World 2004. Then, start the game and go to Conquests. Tada!
Second, Omega, what do you mean? Like register for the site?