Well, when I combine a figure with it's clothing sometimes parts of the nude figure must be cut away so it doesn't poke through. I use UVmapper for this. I select the section of mesh I want to get rid of and assign it to a group called "Junk". In compose I delete the "Junk" group and import the clothing figure in on top the nude figure. That way they are combined. I edit the OBJ references in the figure CR2 to point to my new combined OBJ and with a few adjustments it's ready to go. There's alot more to this, but that's the quick version.