You don't actually need to replace the hub, just remove it and have new studs pressed in. Basically you need to unbolt both the upper and lower control arms and the tie rod then remove the axle nut (you'll need someone to stand on the brakes to do this) and then you can remove the hub from the car, have it pressed apart and new studs pressed in, you might want to check and see if you can get at them from behind, if you can you can just knock the old ones out and knock new ones in and then tighten the lugs to pull them all the way in.