-movable Steering wheel
-Working windshield wipers
-Better driving feeling
-Movable stock calipers
-Working with ImVehFt, it has front lights, rear lights, brake lights, and so on-Great details
reasonable DFF size - 5MB. You should use lod1 models from Forza. Here is a link, from where you can download that models: gamemodels.ru
*this is a russian site, but it's easy to download models from it.
I don't really see a point of converting a AutoVista model for GTA SA. Matheus-340's one isn't an AutoVista, yet its got a suitable DFF size with HQ model and interior.