Wow. Welcome to rmrk.
First off, scripting is something that only happens with rpg maker xp, vx, and vxa. So fulfilling your script request is impossible.
In light of that, realize you've used your very first post in this forum to ask for help on a project that would take several hours and lots and lots of eventing.
I would try a couple things:
Switch to vx or vxa and google active battle scripts. There are lots.
Switch to vxa and try this script: http://rmrk.net/index.php/topic,47185.0.html
Realize that you'll need to invest in a community before making such a large request in the future.
Good luck to you.
That all!
Also, I doubt that the game you showed us was made with RPG maker 2K3 at all.
There's one other thing I want to tell you, and take it as a piece of advice.
There are these things like capital letters and punctuation that exist. Please use it as it took me nearly 10 minutes to understand this text you wrote down.
I almost typed out something you would have found very hurtful and harsh, even though I'm really not like that. Others might might think the same about this way of typing and they won't tell you as nicely as I just did. Just to warn you.
And once again:
Welcome to RMRKI sure hope you'll stay around and make this place just that little bit more lively