Instructions
Insert the Rise of the Zilart CD into your computer's CD-ROM drive. Read the license agreement and click "Accept."
Enter your CD key when prompted, which you can find on the back of the booklet that came inside the game. Click "Next" to continue the installation until it finishes.
Repeat the same process for the next three expansion packs, in this order: Chains of Promathia, Treasures of Aht Urhgan, Wings of the Goddess.
Open PlayOnline from your desktop and log in to your account.
Click "Next" or "OK" on all the alerts that appear until you reach the main screen, which has a "Play" button on top. Click "Content ID" and then "Register Expanded Content." Select the four expansions that you have just installed and click "Register" to bind them to your account and enable access to the new content.
Click "Back" and then "Play"; confirm that the names of the expansions appear on the character log-in screen under the words "Final Fantasy XI." If they appear, your installation and registration was successful.