Big news for the world of modding: CLEO Redux has received an update that will allow fans to customize GTA 4 with scripts.
At the moment, initial support for GTA 4 (The Complete Edition) is announced. Maybe after a while enthusiasts will be able to transfer the developments from GTA 3, GTA Vice City and GTA San Andreas into the game.
We're waiting for a lot of cool scripts for GTA 4!