i cant find
I know for a fact that version 7.1 of Blender is compatible with it, I dunno about earlier versions. As for the walls, those are Bounding Boxes, which are collisions and what not, and there should be a picture next to the Mode button-thing, that you can select what type of view you're viewing, like "Solid", "Texture", "Bounding Boxes", etc.
i couldnt find a version 7.1 to download....