This is assuming you don't want to use a slide hammer to pull the hub, press the studs, and then press the hub into the knuckle..
It's been a couple years since I did this so excuse any errors
You should be able to bash it out with a hammer (don't need a huge one- don't want to damage something else if you have bad aim)
If I recall correctly, there is a section on the dust shield that you need to flatten/cut to have the clearance. You can shave a flat spot on the head of the stud to fit the new one in?
To pull the new one through, get a fat nut that fits over the stud and some washers to use as spacers.
Buy a cheap cone shaped lug nut that matches the lug thread and is open on both ends (so the stud can pass through)
Use a breaker bar to keep the hub from turning while you do this (place in between remaining studs and leverage against the ground)
Helps to put the stud in the freezer before install and you can also grease the knurled part of the stud (Not the threads!)