This is a 3ds max importer for GTA III/VC/SA .dff model files. Since it's a compiled plugin import speed is comparable to Zmodeler2 & it can handle large models.
UPDATE 26/10/2011 Added support for night vertex colors.
Night vertex color and alpha are imported to mapping channels 3 and 4 (x-coordinate only) respectively; let me know if you are able to view and edit the information.
Instructions
In addition to 3ds max you need to have .NET framework 4 and Max.NET installed.