Getting to the bolts tween, 1st cat and exhaust gas control valve (EGCV), and some of, either, the bottom of the joint of turbos and manifold, or manifold and engine. I say it like that because I found it easier to unbolt the manifold from the engine and crane/lift the whole thing out, (EGCV, 1st and 2nd turbos and exhaust manifold) it can be lifted out by two people but easier and safer with crane, once out it's much better to strip down.
I would advise you change all the gaskets and all the vac hoses and any other hoses you can get too, it is quite an involved, long, and sometimes difficult job (physically) but it's not technically difficult.
What "Mellowman" said, I had to cut down and bend a bit, a 14 mm spanner, probably best to do this as you come to it though, you may get away without it.
Either take lots of photos or jot down what goes where and why, make sure you don't loose any bits.