No Cutting needed!
Open the bonnet, remove engine cover and then unplug the lambda sensor thats right on top of the exhaust (22mm spanner or lambda socket)
Then most of the turbo bolts that hold the downpipe on are visible and easy to get to with a socket and extension, they are tight but once cracked off are removed easily, some wd40 on the threads will help.
From under the car remove the 2nd lambda (22mm again) and then use a transmission stand to support the exhaust and either pop the rubber hangers off or unbolt the actual hanger itself (all 13mm).
Access to the last few turbo bolts (4 in total) is easier with the driveshaft shield removed (2 16mm bolts) and unplug the oil sensor plug from the sump and tuck it out of the way.
take off the 2 brackets that go accross the exhaust tunnel (4 16mm nuts on each) and the exhaust is off. Refitting is simple, start with the downpipe and work back.
Tips:
remember to plug the oil sensors and lambda sensors back in!
Lube the joints in the new exhaust with some wd40, makes it much easier to fit
Dont overtighten the turbo bolts, they only require 'nipping up'
Good luck!