its pretty easy to fix man,
take your caliper and rotor off, once there off you will have to take off your hand brake shoes, i would suggest taking pics of the mechanisms as it can be a bit tricky to put back together if you havnt done it before.
once everything is off with a hammer knock the stud out. once out put the new stud in and do it up on the hub before assembling every thing, now you wont be able to do it up heaps before the wheels start spinning but enough to get a bite.
start putting every thing back together, once the rotors back on applie the hand brake, put the nut back on the stud and do it up fully.
hope that heaps i had to replace a couple of studs on the weekend and this method worked for me