is the wheel off the ground when you are trying it?
are the other nuts on when you try to undo it??
my point is basically, you'd want to take off as much weight off that nut as possible, so keep all the other nuts on, which will hold the wheel in place, and then try to undo that lock nut..
if the other nuts are loose, the weight is all on that one tight nut,
if the wheel is in the air, their shouldn't but much weight on the nuts at all
if its on the ground, it'll be harder
if its the front wheels, u can get someone to stomp on the brakes while you do it.. if its the rears, pull that handbrake up tight..
anyway, a big fat breaker bar should do it
if the nut is completely hacked (no socket fits) then weld another nut onto it and undo it...
hopefully your rims will come out okay!!
just remember next time... use some anti seize and torque them up to spec.. thats if you have a torque wrench (80 - 90 ft lbs is what u want)....
never use a rattle gun! they will hurt the stud threads...
i feel ya pain mate!!
if the stud is damaged, if if its the fronts, it usually means you have to pull the hub out and replace the bearing to access it... a real pain in the ass (vr4's anyway, not sure about evos... most likely the same!)