I removed my turbos not too long ago, it isnt that hard but very time consuming. I first removed the front turbo and left the water and oil feed lines attached to the block, I gently pushed them down in order to take the turbo out and it was pretty straight forward from there, I had one person under the car to make sure that they werent being bent while pulling the turbo out. The front turbo is the hardest but the rear one is pretty easy, its very straight forward once you have the front one removed.
That flare nut you are talking about I had heaps of trouble with I couldnt unbolt it either up to the point where it was totally rounded off lol. What I did was remove the bracket that holds the line right at the end, once you do that you'll notice that you can move it around enough to remove the turbo, thats because its actually a rubber hose right behind the head where that line continues, just dont bend it too much. Anyways thats how I did it because I was in panic mode lol.