There is an entire thread under Bryce Talk on Daz Studio forum.  There is an explanation of what to install in which order and depending if you are upgrading from and older version or not.

I understand the Argument on Daz studios part for making the files split like that, to make it easier for people even on Dial-Up to download.  I mean even yourself and stalls and stops trying to download such a large thing.

But this type of thing is very confusing to many.  What they should do is include a small installer program which you download into the same folder as the rest of the files and execute.  It than run the other ones in the order it should.

Honestly whenever you ask end users to do more than 1 or 2 steps to install a piece of software you are asking for big trouble.

Installation should be made easier.