Thank you all for your help.
I allready tried to dismantle the studs from the outside--It didn't work. On the 1990 models there is not enough clearance between the hub and the splash guard/bearing assembly to get them out. I found that one must remove and disassemble the entire knuckle in order to access the studs. This is far beyond my capabilities (seeing that I lack the proper tools, time, and experiance) so I was forced to pay a mechanic to replace them for me. While I'm at it I will have the car re-booted as well.
Thanks for you help--and Oh yeah--Make sure that BEFORE installing new lugs that the thread pattern is the same.
Hint: the thread pattern on Kia lugs are different then the thread pattern on nissan sentra's.
