DLC IS COMPLETELY FREE REDEEM ALL YOUR PRODUCT KEYS ON THE ORIGIN WEBSITE

as a side note everything linked is all Mass Effect/EA's official websites, nothing here is 3rd party

The DLC is not that hard and here's what to do.

Step 1. Go to Origin.com and make an account.
Step 2. Buy the Mass Effect 2 DLC Bundle ($9.99 currently)
Step 3. Go to https://help.ea.com/en-us/help/origin/origin/download-dlc-for-classic-origin-games/ and scroll down to Mass Effect 2
Step 4. Download and run the installers from the linked website - They will detect your game on their own
Step 5. Login to the game, you will receive an error that the DLC cannot be verified this is normal.
Step 6. Connect to the Cerberus network with the mini computer at the games login screen - Use the Origin account you created to login

That's all it takes

lol EA has basically made it more convenient to pirate the dlc. Very smart.

@KUSHANUGGY How did you get the DLC?

It is a pain to get the DLC but I went through it. Also I think once you have the files installed you don't need to log into cerberus network anymore