[pgarner]

dont use the standard scissor jack you get in the boot get yourself a hydraulic jack makes the job so much quicker.
Daves right loosen the nuts in the same order as theyre tightened 3,9,6,12 to brake the seal. then raise the car.
its also a good idea to rotate the wheels front to rear. This keeps wear even all around also means that your wheels dont end up "welding" themselves to the hubs.

If its a 5 stud hub. Starting at top and working clockwise 1,2,3,4,5. loosen / tighten 1, 4, 2, 5, 1.

your handbook should tell you how tight they need to be. Normally this is around 110Nm so you should really have a torque wrench handy to do them up.