Which wheel, front or rear?
Front - remove wheel, remove brake caliper, remove rotor, press or pound out stub (prefer press, pounding can damage the wheel bearings), snake the new stud in, might have to rotate the wheel flange a bit to get it to a spot where it'll go in. Get your stack of 1/2" washers out, put em on till the non threaded portion of the stud is covered, crank the lug on a few turns, remove, take off a washer or two, rinse lather repeat. Reinstall everything you removed to get at it.
Rear - remove wheel, remove brake drum (chock wheels and release parking brake), press/pound out stub, same stud installation process, reinstall everything you removed.
It's really not that difficult, took maybe 5 minutes to swap one while we were installing a new axle in a friend's jeep a month or two ago. Of course we hadn't installed the brake rotors or calipers or anything else yet so that's only the time to install the stud, not removing/reinstalling stuff to get at it. He was on a tight budget so we just stole a stud off the old axle before scrapping it.