To start this quest walk around for a little bit once loading up the game a good place to go would be The Citadel that's where my signal came up in about 30 seconds so I recommend fast traveling there. Once you get the signal fast travel to "red racer factory" and head south there will be a door off to your left if your walking south that is hidden in a corner called "Door to Baileys Crossroads Metro" that's when you know your going to right way. Once in the tunnels walk around following your marker and once out of the tunnels you will get to escalators. Walk up them to be greeted and proceed to fight clearing the building up ahead. Once through you will get to the Outcast Outpost and you will need to go down the elevator. Once inside you will speak to many people which will lead you into to a simulation. Once in it you will unlock the achievement.
Map on where to start quest: http://i37.photobucket.com/albums/e77/Folvex/aiding.png