They are in!!! they are in!!! Today I just finished putting in my rear discs on a 4dr 00 honda Civic, a 4 hour job but well worth it! Here's what I used:
Rear Brake discs assembly from a 93 Del Sol SI
E-brake cables from a 2dr Integra 95
Master Cylinder and Prop valve from a 2 dr 99 Civic SI
Brakes work great so far, so for those guys that have 4dr Civics it's possible to install Rear Disc Brakes just like a 2dr. I had to modify one of the brake cables it was a little 2 short so I had to extend it I had to cut a brake cable that I was not using and put a plug type to hold both cables and crimp the wire, so far it seems to hold.