The first beta version of the filter for ZModeller for WFT export has been released. It actually works, although there are minor bugs. This filter allows you to export scenes in WFT format. When you specify a file to export, the filter will look for a model node with the exact same name as this file. Thus, you can have multiple models in an assembly loaded into zmodeler, but only the necessary part will be exported.
Note that if no matching dummy node is found in the scene, the entire scene will be exported. In simple terms, this is a filter that will allow you to create and edit transport models in the zmodeller program and not only for GTA IV. The filter is not yet stable and may cause crashes, but for those who want to participate in testing and just try their hand at GTA 4 modeling, you can try.