fitting new rear discs

I'm specifically asking about changing the rear discs on my gta. As far as I can tell, its not as straightforward as the fronts? Need to loosen handbrake cable and also getting pads and discs off not as easy as fronts either? Can someone elaborate as I want to do the discs myself.
Also wise to change the brake fluid? Is there a quick and easy way to do this?

I have done my rear pads and discs 2 weeks ago. It was an quite easy job. I will try to explain in text form and hope it will help.

1/. open the brake fluid reservior cover. Put towel around it just in case of any spill.
2/. Ralease the handbrake.
3/. Undo two bolts of the rear caliper. One at the top and one at the bottm. You will need 2 spanners to undo the bolts.
4/. You can slowly slide the center part of the caliper out and take the old pads out.
5/. Push the piston back by turn it clockwise. You need a special tool that has two dipples to fit into the piston slot. I did it by using this tool and g-clamp with turning action.
6/. Replace the brake pads and remember to clean the area and apply copper grease around the new brake pad edge and in between the pistion.
7/. Undo the little 10mm bolt located near on the center part of the brake disc.
8/. Now you can remove the disc in an angle. You will slightly rub the caliper but it will come out.
9/. Put everthing back the same way.

I quite enjoy this job and I get the chance to clean up everything I want.

ok, thanks for the walk through! Will pick up a piston retraction tool and torque wrench at weekend. What torque settings did you use?

ah found this:
caliper attachment bolts - 42-51Nm
disc attachment bolts - 5-13Nm

Correct?

Originally Posted by ohwell

Also wise to change the brake fluid? Is there a quick and easy way to do this?

Should be done every couple of years. Recommend Gunson Eezibleed... ok using two person method to bleed but the time it would take doing a full fluid change doesn't bear thinking about.