Here are a few different ways of creating a figure. Each one is starting out with a new import .obj file:

1. Import the file with the grouping already assigned in your modeling program. This is done in most of them by assigning materials to the different sections of the model and naming it accordingly ( e.g. lShldr). Or you can assign the groups when you UV map the mesh. Once the mesh is in Poser and the groups are assigned, enter the setup room. You can either activate the bone tool or you can use a donor rig (like the DEV rigs that come with most figures).

2. You import your mesh, bring another figure onto the stage (like V4 or whatever), open the grouping tool and select auto group according to: and select V4 or whatever.

3.  You import your mesh and open the grouping tool and individually assign your groups.

Either way, no matter how you get the mesh grouped, it has to be done before you enter the setup room. That is why I was telling you to export your figure. You have to start over or live with the grouping and bone naming as is.

You also have to open the hierarchy editor and make sure that everything is parented correctly, and to the hip. 

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.