In the description it says RPG Maker. Isn't there only one language in RPG Maker?
There are several actually:
RM95, Sim RPG Maker, RM2K/3, RMXP, RMVX, and there are a few RPG Makers for consoles in America as well. 3 or 4 of them I think.
RMXP, and VX I think, use Ruby as a scripting language. Unfortunately, I'm only confortable with it enough to edit it other peoples scripts though, I don't make my own. rpgrevolution.com is a great site though, like Darklight said, and check out
http://www.creationasylum.net/ as well. That's where I usually go.
EDIT: Actually, upon further inspection, I think I figured it out. First of all, just make it so that you never have more than 3 people in the party. Then, open the Window_BattleStatus script and find "super(0, 320, 640, 160)". Play around with these values to resize the status window. 0 is the starting x position and 640 is width of the box all together. The actors' stats and image are controlled by the actor_x variable which is defined at "actor_x = i * 160 + 4". Play around with those numbers to get your desired positions and spacing. Hope that made sense and helped a little.