Thanks guys....
So, the solution is a kind of combination of workgroup referencing, layer linking and symbols....
Ok, to tell the truth, using an external file is not so important for me - I usually use them because it's much easier to view and modify a small part of the building and later assembly them in a master file than continuosly switching on-off layers on a big building just to be able to concentrate on the part you are working on.
If I can do this with VW, that's ok whatever it's called symbol o layer linking....
So the next question is, can I edit these "symbols-layers-references" in separate windows? I mean, in autocad you can open several documents at the same time without the need to close the main document, you can edit the parts and watching how the whole model is updating.
Please, say that is possible...
Thanks,
andras