Installing New Chapter

Hi all.

I have just bought Factions and want to load it up on top of Prophesies so that my Proph char can travel to Cantha. My question is this:

Do I need to go through the full install process for Factions (ie. load install discs and load the "program") or do I merely attach the ID Key that came with the box to my Proph account (ie. at the startup screen)?

I am mainly worried that by going through the full install process for Factions I may, in some way, not be able to link my Proph account with my Factions account.

Assistance, as always, greatly appreciated.

Just go to the manage keys option after logging in to Guild Wars and click add key. Type your new key in and thats it. The game will give you the option to link the chapters or make them standalone. It will then download the new content. Do not install from the cd. Enjoy

Thanks mate. That what I thought would be the answer.