4. I prefer group window in posing room more then grouping window in cloth room* and I selected cups as a new group in posing room. As you see selection is not perfect but it is not really important. If you wish try select symetrical groups. In cloth room click "new dynamic group", later click "edit dynamic group" and click add group which you created in posing room.

*To be honest I hate both grouping tools. This is most annoying part of Poser and you owe me vodka for this tutorial :)