Well, if you had read my huge statement above you would know if you could add/edit code. I specifically mention that the language used is BlitzPlus and Blitz3D.

I wouldn't do java because we simply lack anyone in the field of that scripting language.

I find the blitz languages to be rather easy to learn which is why I'm also pushing for RealmCrafter. Another reason is because of the very nice graphics that are on the Pro version of it. Not saying that the first one didn't come with nice land meshes. I've also worked with the program for a while and can conclude that it's a good program.