On Noveria, when you are given the oppurtunity to accept the assignment from Lorik Qui'in to get the evidence to catch the Salarian (Anoleis, the administrator guy who has his own office) in his rend-based scandal, agree to it. He will open up the shut-down elevator, go down there and get the evidence. Upon exiting to go back to him you will run into Gianna (receptionist lady), so talk to her then go meet her in the hotel/bar. She will ask you to get him to agree into turning Anoleis in, agree and go talk to Lorik Qui'in. Talk to him, and do the following:

Step 1:

* (Top Right) Testify against Anoleis
* (Top Left) {Paragon} You'd be a hero
* OR
* (Bottom Left) {Renegade} Damn right I will

Step 2:

* Talk to him again
* (Left) Matriarch Benezia
* (Bottom Right) Another Question
* *Repeat step 1*

Repeat these two steps for whichever one you want until the achievement unlocks, then switch to the other for that achievement. Remember to do whichever way you DON'T want your character to be first so when you finish with the second achievement, you are high in either Paragon or Renegade, depending on your preference.