I jacked mine at the two rear jacking points. That way the suspensions is free, you'll have better access to remove and install the catback. I just cut my old catback off right after the mufflers. I just put the my catback together like the instructions said and had no problems. message me if need any questions.
Never use jack stands when you are removing exhaust, there is a chance the car could fall on you, use either ramps or a lift to be safe, make sure the exhaust has cooled down when you work on it,
you'll want to wd-40 the bolts and let them sit before trying to remove them, and get yourself a big torque wrench to get them off, most of your time will be consumed getting the stock parts off, the new exhaust should slip right on