I am trying to create a prop from M3's head. I need the prop to include the following groups: head,neck, L eye and R eye. The grouping tool only allows you to highlight one group at a time, not all four. I have tried making the four group separately but am having a problem, keeping them together when moving them around the window for posing. Is there a way to included all four groups into one prop? I will give credit when I complete what promises to be a wonderful render.

All you need to do is export only the body parts you want to an OBJ file.
When exporting, click on the "UNIVERSE" box to clear everything, then select those body parts you want.
The options you want on the next dialog should be only "Weld body part seams" and "Include existing groups in polygon groups".
You can new load the OBJ you created and it will have the grouping and materials of the original body parts, but it will be a single object.

Strictly speaking, you don't really need the grouping for this, unless your planning to rerig as a figure so that you can use the morphs.

With the grouping tool you could also "make new group" named "head" and the select "all" for that group and then spawn the head as a prop... the materials should stay intact. I had changed the .pp2 to .cr2 to get Morph Manager to transfer head morphs to a head prop in the past but have not tried it lately.

You could also export the head posed with different morphs applied as seperate .obj and if you have not moved the head in space you can then import those as morphs to your new prop and that can move and morph but if you moved the head prior to exporting the morph .obj files then as morphs those will also shift the head prop around in space.

Just FYI if you have some different objects that you want to move as a group you can parent the together... in this case open the hiearchy menu and drag the lips, eye, whatever onto the head prop and they will move and scale linked to that head prop as a parent... you can fuse parts together by exporting them as a single .obj and importing back in but youy want to make sure their are no unintended conflicts in the materials assignments.

The easies way to cap the neck would be to shape a ball or cylinder prop to fit in the neck and parent that to the head prop... if you cap the neck by altering the geometry it won't take the morphs any longer.

Thank you very much for responding This did work to an extent.  The posed eyes are not with head. They are plain white, instead of looking up at an angle.

If the geometry is there, you need to make sure that you setup the materials correctly.

If neither of the above is the reason for the problem, please post a screenshot and/or render for reference.

A very simple way of making a head is just to load the figure, and in hierarchy editor  turn off visibility of the parts you dont want. That leaves the head rigging and morphs intact , so you can have the eyes open , point at something, open the mouth , stick out the tongue and that sort of thing. None of that will work with the exported obj file.