While documentation on this specific file name is scarce, archives like this typically fall into one of two categories for Grand Theft Auto: Vice City :
Older mods for Vice City are notorious for corrupting save files or crashing the game if they aren't compatible with the "SilentPatch" or specific game versions (v1.0 vs v1.1). How to Install (If Verified) GTAViceCityRobo.rar
Replace vehicle or weapon files in the models directory. While documentation on this specific file name is