Funny, I just installed the RPG Maker . .. AF lite I think it was to try it out. Not sure if the RGSS can be modified, but it is certainly viewable.
It is just standard ruby from the looks of it. I can't help out with that at this point as its been several years since I've programmed ruby. May be a reason to start back doing it again though.
header('HTTP/1.1 420 Enhance Your Calm');