Walk over to the ledge on the left during the training mission. Do a double jump to get up onto the ledge, then turn left. Go to the keypad and enter "5656" to enter the second room. Talk to the NPC. When done, you can knock her out and fail training.

Start in the training area. You have to wait until the intermission scenes are over and they "calibrate" your equipment by looking in the four directions. When you can move, run to the right and do a double jump off of the wall on your right to climb onto the ledge. Once you are on the ledge, turn to your right and you will see a door. Open it. Inside you should find a lock pick. Exit the room and go through the obstacle course. at the end. Lambert will tell you to find a way over the gate. Do the usual (a double jump over the wall and to the other side) but do not open the "garage door". Instead, go to the locked door and use your newly acquired lock pick. Inside, you should find a computer. Use it and you will retrieve a Data Stick. On it will be a keypad code for another secret area in the training room. Return to the beginning of the training level where you first started. This time, do a double jump on the other side. Here, you will find the door that requires the keypad code. Once inside, talk to the NPC. Note: if you knock her out after completing all of the conversations, Lambert will fail you.

Walk over to the ledge on the right during the training mission. Do a double jump to get up onto the ledge, then turn left. Go to the door and open it. Inside, you will find a set of lock picks.