Need some help with my brakes!

I gotta '96 honda accord 4 door and I'm trying to replace my back rotors.....i got the caliper off but the 2 screws holding the disc to the hub will not come loose and threaten to strip.......are rear honda rotors pressed on like the front???? My haynes manual just says unscrew the the screws and slide the disc off.....does anybody know what i'm talking about??