i have been in the process of changing my rotors and pads on my 93 alty(figure i'll start small). pads came off no prob, but the rotors were shot, so i have been trying to change them. got the floating and set calipers off but cant get the actual rotor off, haynes manual says that it just comes off, thats bullshit b/c the thing wont budge. Should i just hammer the shit out of it or are there bolts of some kind holding it in place? help?