Ok so I followed this guide: http://wiki.tockdom.de/index.php?title=Modeling_With_3D_Editor
I exported my model to OBJ and then imported it in the BRRES editor.
I checked course model and imported it.
The problem is that it cannot be displayed,following by a message that the renderer probably crashed...
I tried to change settings in the BRRES editor butit didn't help. I also tried to load it in SZS modifier,but it never finished loading.