From various mods, I have built up an ini folder located in my data folder. Is that the correct location? Or am I supposed to take those ini files and add them to the Mygames/ini folder...where other ini stuff is for the game?
What omeletted answered. All my mods look for their ini files in the data\ini folder and will stop working if you move it elsewhere.
I am using the Darn 1.3.2 mod, and I was thinking of adding Elsweyr to my game. How exactly am I supposed to add it, so the world map lines up to the Darn 1.3.2 Cyrodiil map?
I will reccomend my http://www.tesnexus.com/downloads/file.php?id=35969 mod. It comes with 4 different base map styles, and will automatically display Elsweyr on the map if you have Elsweyr active in your load order - and it does similar for a number of other mods that should be visible on the world map. And it gives you free zoom in/out in the world map as a bonus

(and it is of course compatible with Darn).