Hi Joachim, inside MoI go to Options > General > "Edit .ini file" button and inside moi.ini in the [NURBS Import] section set:

[NURBS Import]
UseHierarchicalNames=y

That will make object names that have the parent/child information embedded in them, like A: B: C: part_name

The names can get quite large with this but hopefully that will give you the structure information you need.

- Michael