Once you get the distributor cap off you should be able to pull the button off without a problem. Just remember to install the new button in the exact position you pulled the old one off.
See http://www.ehow.com/how_4506404_replace-rotor-acura-integra.html
Remove the bolts that hold the distributor cap onto the distributor. Once this is off the rotor can be reached and replaced on a 1994 Acura Integra.
Clockwise.
1-3-4-2 Rotor turns clockwise.
asfar as I know there is no integra tlAnswerTrue, but assuming the OP means an Acura Integra, jack up the car, remove the wheels, remove the calipers (two bolts on the back side), and carefully support them by wiring them to the spring (you don't want them hanging by the brake line), and then drill out the rotor screws (because the things always get rusted in there and are impossible to screw out). Then just pop the rotor off (you may need to whack the back side of the rotor with a hammer to break it free of the rust) and put the new one on. Do not replace the rotor screws - they're completely unnecessary. The lug nuts will hold the rotor to the hub just fine. You will need to open the calipers before you slide them on over the new rotor - depending on which brakes you have, you will either do this by turning a very large screw, or by squeezing a button in the center with a C clamp.Then just replace the calipers, and the wheels. Pump the brakes a few times with the engine on. Then roll slowly forward and hit the brakes. If the car does not stop, do not drive it. Jack it back up and figure out what you did wrong.
You'll need to remove the wheel, the brake pads and the caliper. Once all of that is out of the way, there are rotor retaining screws that need to be removed, either on the studs, or on the axle itself.
remove the rotor bolts(philips). do not strip them. take off caliper bolts 12mm and caliper carrier 14mm. you can remove also the metal plate on the arm for more room
timing belt probley comon thing
After the tires and calipers are off take a big hammer and let out some frustrations. Make sure you turn the rotor a little each time you hit it.
That measurement is stamped on the rotor.
Should be "peel off" after removing brake caliper, unless it is rusted to center hub. Then try WD-40 or similar product to remove rust or corrosion.
If it has a distributor, check the rotor button for a burn mark underneath. The high energy coil will sometimes burn a hole through it causing the fire to ground. Replace rotor button.