after removing the tire you need to remove the caliper wich is relativly easy turn the steering weel to the outer position depending wich side you are on and remove the two bolts holding the caliper...
If its the nut that's giving trouble, a cetiline torch, heating it red, and jumpin' the mother out of the Heafty wratchet with a pipe on the of the wratchet for torke.If the nut is off and the roter...
I just changed the pads and rotors on the wifes 2003 escape and it was stuck but you have to hammer the rotor all around and that will loosen it up ,you might want to spray some WD40 on before you...