It just installs directly from the in game interface once you buy it off the EA store. I guess it's evil for you to have to have an account with EA to buy and install it, but they have to keep track of their customers somehow. I bought all the DLC and for the most part it's pretty disappointing. Leliana is good if you REALLY like Leliana and want to know more about how she came to be in Feralden and the Chantry, and Morrigan is good if you want some possible resolution of that story arc, but they're both terribly short. Golems of Angarak is a good adventure, but you don't get your party, and it's mostly there to be soul crushingly difficult. Pick your poison, if you choose, but keep in mind that all the DLC except for awakenings, which is long and totally worth it, are short, and probably not worth the price. I suggest you buy Mass Effect 2 DLC instead because it's pretty clear where their DLC team's attention was.