Your rear brakes are already shot on your 2004? I guess they don't make 'em like they used to....

Anyways...when I did this simple procedure on my Integra, all you have to do is unbolt the caliper, remove the pads, screw the piston back in with the tip of a screwdriver, install pads, and rebolt the caliper back on.

The cable doesn't come off at all and don't remove it unless you want to have to bleed the whole brake system. Also, make sure when you are screwing the piston back in, that you don't twist the boot. And always be sure to lather the back of the pads with the supplied grease.

Good luck.