Turbo Mode:

This cheat is easy because you can run and mown down the guys easily, and don't worry about getting hit because there's plenty of body armor. The easy and quick way to do this is to pull out the soviet and use the "Run and Kill" tactic. Pick up the keycards and any body armor and you should be fine. Also, a lot of guards might be in front of you at times, so just fire into the group and run past them as you're firing. After you take the picture of the satellite in the last room, open the door and follow Orumov all the way to the end.