Problem with transformation matrices on some parts

[Florentin]

You should use model.ldr file for .io-s

So I have to resolve all of the parts and subparts manually to get a full mesh to display it ok.
Is there a way to differentiate if a reference (a Line Type 1) is leading to a part, a subpart or a primitive for easier fetching of the part? Is there a list or something where a program could look up each filename and find out what kind is being meant?