Reinhardt:

The GROUP function has been asked before, and it might show up in some future version. Nothing definite about that, though.

In the mean time, if you want to group several objects there is an easy workaround.

1 - Open a new instance of SH3D
2 - Select your group and copy it into the new, empty SH3D
3 - Export the group as an OBJ using 3D View --> Export to OBJ format
4 - Import your new OBJ using Furniture --> Import Furniture

Works like a charm!

Tip: There are several tutorials available that come with loads of tips.

Hans