OK here are 3 vids by Roland1905. I have played with him some and he made these really good vids on youtube on how to get them. They have some really good advice.
A few things I can add are: for BDBII, I think it's easier to drop your partner off at the glitch and fly the heli up to the cabin roof, but that's your choice. My vid is below his and there is no sound.
As far as Deal Breaker, I think it's way easier to take the car outside to the building and the pilot takes a car from the garage. I never bother with parking the car to keep the garage open. If you hit just above the garage the door, the game almost always ends, no matter if it looks open or not. Also done this way, the pilot should be getting there just as you get there. When the pilot gets there first, many of the bikers start running upstairs making them harder to get as shown in the vid. They should all be in front of you, not running towards the stairs like shown in his vid. It's a small point, his vid is really good and shows a lot of good things.
My Deal Breaker vid is only for the drive and getting the bikers on the ground, which I did pretty sloppy job of it. Sorry, no sound in that one either.