ill give it a try just want to make sure i dont mess up a new set of tires, i seem to have bad luck with them an i always rotate them so i must be doing something else wrong
You want to make sure the tread patch goes all the way across the tire. So if you roll the Jeep with the tires on, the chalk should come off evenly. If not then adjust the pressure. If it wears off on the center only you know you're over inflated. You will need to do this with the front and rear tires and they will take different pressures. The door should say 28psi on the front 30psi in the rear, IIRC.
Keep in mind that a 8" wheel will require less pressure then a 10" wheel for the same pattern. This is because the tire needs to be a bit under-inflated on the narrower wheel. The narrow wheel pinches the sidewalls in which causes the tread to round out a bit as if it was overinflated.