for the chain smoker achievement, there are 3 additional packs added into the game, all 3 in security research center.
the first is in the computer room in the back on a table
the second is in a connecting hallway, blow out the glass with the riot siut, jump out and climb the crates, zap/stomp the guy by the horizontal pipes and the pack is laying on the ground
the third is in the big room with the flamingo's, on one of the crate on the far wall, a little hidden but it's there.
hope this helps a bit