It should be pointed out that this isnt actually a 3D modelling tutorial, in the traditional sense.  It's what we call kit-bashing.  Taking parts of other models, in this case models you purchased from Daz, and using parts of them to quickly create new objects.  You wouldn't be able to redistribute the new models, because they don't contain original geometry, but I suppose using them in your own renders is fine.

Funny thing, though, is that modelling that chair from scratch might be faster than kit bashing it.  Takes time to find the right models you need to rip parts from, and then all the editing.  A chair like that would probably take no time at all to just extrude from splines.  Not criticizing your techniques, mind you, as I'm sure this could be helpful to some people.  I'm just putting it in perspective, from a modelling standpoint.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.