I don't know if you followed the links I posted before...
DAZ for beginners
DAZ F.A.Q.
DAZ Forum for Studio
DAZ Tutorials
Renderosity Tutoials
Renderosity Studio Forums
(There is far more stuff available for Poser, much of which is applicable.)
Basically rigging is providing the skeleton and joints so your previously static 3D mesh can be moved, eg, it is the rigging that allows V3's arms to be place at her side, etc.