For the USS Nimitz, theres a .cfg file (cvn_68_69) you need to put in your AICarriers2 installation (C:\Program Files\AICarriers\conf.d), then go in game to load the ships. To load them in the sim, you need to first press Alt, and verify that a bar is at the top of your FSX window. All the way to the right on the bar, is a menu called Addons. Go to AIShips or something along the lines of that (I'm doing this off memory, excuse me if I'm wrong), pick the boat and configuration (I recommend Configuration 1 and fleet for everyday use), and go do some traps!