The League, of which the Stepsons are part, has been impressed by your efforts against the Marauders. They send you an e-mail, asking you if you would like to join them. Their probationary mission takes the form of spraying graffiti on the flagship of the new Governor of Hoffer's Wake. This means you have to sneak into the military facilities at Memnon, which will be bristling with warships.
1) You will receive an e-mail inviting you to meet the League at a pre-arranged spot, after reading this, you will notice a League meeting waypoint in your contact list upon launch.
2) At this location a ship called 'Wilbert' will hail you and ask you if you want to join the League. Answer 'yes'. They explain the mission to you, saying that the flagship is at the Memnon Military Defence Dock, near the planet of Alexander. They will undock a small paint droid which you should pickup and take with you.
3) Go to the 'Memnon Military System Defence Dock' that you will see has been put onto your contact list. Once you are in range of the station, Smith tells you to head for the munitions store, do this.
4) Once close to the munitions store, undock the paint droid and remote link to it. From here, guide the droid slowly towards the flagship, which you will be able to see on the contact list, making sure you do not get too close to the ships patrolling around the station. Once you get close to the side of the flagship, a cut scene will kick in and you will see the graffiti on the side of the flagship.
5) After the cut scene you will find that you are back at your own ship. Don't forget the droid, if you re-link to it and fly it back to your ship then dock to it, you will be rewarded when you go back to the league.
6) At this point, you are ready to fly back to the League meeting point to let them know you've done it. Fly back to the League meeting point and you will be rewarded when you select 'yes' when asked if you completed the task.