glue the tire to the rim...not necessary for normal comuting but I can see it for situations where you might put on a serious amount of torque. it's hard to grasp the question. Anyone that normally runs 120psi is on a bike with decent tires and if that person is now running studs I have to believe he/she knows how to read the manufacturers' recommeneded pressure rating on the sidewall so I think the question was tongue in cheek.
that said I'd comment that even without gluing the tire to the wheel it's safe to run most tires well below the stated rating. Once winter hits I don't swap my studs out till spring so gluing in a few spots probably wouldn't hurt. I don't hesitate to run my Nokia 294's at 30lb and I weigh in around 250, but then again I'm typically just road riding on ice, not talking about offroad trail riding which puts a lot more torque on the wheel and greatly increases the chances of bottoming out the rim. Flat icy road riding allows a person to inflate at a lower psi than you would need if you're pushing through hilly trails.