Now that the new CheatDevice for Vice City Stories is out, the CheatSync service is providing some codes for it. There are only a few now, with more on the CheatSync site's forums, but we can expect more soon.  Among the current codes are teleporters to certain vehicles (jetskis, speedboats, etc.), clothing modifiers, garage vehicle modifiers, infinite breath, and more.  Until CheatSync is updated, new codes will appear on the forums.  Hopefully we'll soon see utilities like Pimp My Garage working for Vice City Stories.  In the meantime, these codes are plenty of fun.