Hi Michael,
I'm using Cinema 4D to import the object, and unfortunately it imports the attached file as one combined object... and I didn't find a option in the settings to changed that. Not yet...

Maybe I'll find a workaround... although I don't think so....

Anyhow, thanks a lot for you efforts...

PS: Do you know a 3D programm that imports the obj file as separate objects?

Greetings
Kailash