Not too bad, the handbrake is not an easy change but is DIYable, I did mine on the 4200 in 2014. Set aside a day, get the car at a good height and PROPERLY supported (unless you have access to a ramp/lift), because you have to work right under the car with the rear wheels and disks off. If you can, get the shoes reliined at the same time or get a new set, they are not too expensive if you go to people like Superformance. (I have a set you could get reconditioned from an 03 and send me yours back afterwards).
Wheels and disks off, free the ends of the cable and work in and forward releasing the clips and noting the routing, the fun comes over the gearbox as space is very tight! If like me you have huge hands it is a real bu99er! there are several clips to work out over the box but when free replacing is simply the reverse. If you are not putting new disks (actually even if you are) run the reconditioned shoes around the inside of the disks by hand a few times and then file off the shiny bits and repeat until you are getting full contact as this will give a massively more efficient handbrake. New forum disks should be available if you need them, PM Matt (Conearo) to find out.
Settle the shoes in the drums well on rebuilding and adjust the daisy wheels and only then tighten the cable fully. It is a very satisfying job and worth doing properly IMHO...
Oh yes an Italian tune up will sort the cold cats