Bah I just did it, silent all the way. I stole the video tape after it said I was caught on CCTV and ended up with caught on camera in the ratings. WTF. So got professional rating.
That blows.
If you run quickly enough and hug the elevator wall as much as you can then you should be able to avoid getting caught on camera, it is tricky though. If you're just trying to get the 5 silent assassins then I'd recommend playing "A New Life" over and over. It takes about 4 minutes, it's the one where you have to kill the guy in the witness protection programme. There's a catering van at the beginning of the level, if you wait till the delivery boy goes into the house, drug the doughnuts with sedative and then pick them up, you can deliver them to a white van on the street which has FBI agents inside, once they're knocked out just steal one of their outfits and leave the van.
Then go to the front of the house, just to the left of the front door where the two FBI guards are, there should be a box for the satellite TV which you can break, just make sure that the delivery boy doesn't witness this, he should be having a cigarette down by his van at this point. But anyway, once that's done you can go in through the front doors, turn left and that will take you into the living room where Vinnie is, and if you've timed it right the FBI agent guarding him should just be leaving to go outside and see what's happened to the TV. At this point you can fiber wire Vinnie, drag him into a closet in the back of the room and then close the door, FBI won't go in that closet so he'll be undiscovered there.
Then make your way to the garden of the house, to the right hand side of the back of the garden there's a shed which the pool boy goes into, then he walks out and cleans the pool, just wait for him to leave the shed, then pick the lock, pick up the lighter fluid and run over to the BBQ. Rig the BBQ, it doesn't matter if anyone witnesses it because it isn't considered a suspicious act, then when Vinnie's wife comes over to use the BBQ it should set her on fire, she'll jump in the pool and die. You can then pick up her microfilm necklace walk back to the FBI van, take your suit and exit the level.
I'm making it sound more complex than it is probably, but it takes about 4 and a half minutes.
