In the new update you create your account via the in-game GUI menus!Recover Account Close Account
Full Game Installer + Mod
If you have not installed Halo 2 yet and don't want the trouble of installing from the official disk.
Cartographer Mod Installer
For when you already have the game installed and want an automated method of installing the mod for you.
Manual Mod Install Package
For when you already have the game installed or want to set up a dedicated server.