Niclas,
This is a was a fairly easy job for me, it took about 3 hrs. I replace pads & rotors all around. Put on brembo rotors and friction tech carbon/metalic pads.

Some special tool will make it easier; 7mm socket allen wrench, flywheel puller (or rubber malet)- to remove rotors, thread lock, torque wrench, power break bleader, new rear break cut-out shims & roll-pin punch. The rest of the tools (10, 11, & 14mm)should be in a standard metric socket & wrench set.

Bay 13 has great instructions.
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'98 S70 T5M