gray, unfortunately you can't group in Carrara and imprt it directly int UVMapper, the work around I use is to assign the groups I want as shading domains which UVMapper does recognize. You can use "select by material" in UVMapper to select the shading domain then assign it to the group name you want.

One thing to remember. Carrara doesn;t recognize UVMapper groups, unless you import it with create one object per Group checked on, and this will break your model into multiple parts creating duplicate vetices.

mike