3d Famous Designers

VIDEOGAME already in projects! I have got a doubt!?
Me and some freak friends decided to make a videogame taking the best of the famous GTA series, I´m the 3D designer, I design with 3Ds Max Studio and I´m also in the charge of make the engine with NaturalMotion Endorphin AKA Euphoria. Another friend will be making the scripts for the videogame but he doesn´t know when, because, he started the college days ago and we started the videogame yesterday. Well well back to the subject, this is my B.I.G. doubt, how can be the scripts made, for example, make the water move, make the vehicles move around the city by theirselves etc etc, please, I´ll thank that one who tells me what´s the software with which the scripts can be made, I´ll really thank him very much.
PD: If someone wants to join the videogame´s project, add me niko_xsc@hotmail.com and ask me for a petition, it´s easy.
Good luck for all with the school´s comeback!
Why don’t you check with a video game website like GamersThrone?
The Green Knight 3D Animation Sample