kinda buggy, hah i can duplicate any item inside the multihouse interface

When using this mod and only this mod, I'm showing 225 missing texture errors in my Minecraft log. I put the errors in pastebin rather than past 255 errors in this comment. But they're all like this:

Using missing texture, unable to load fastfurnace:textures/blocks/furnace_side.png

http://pastebin.com/aK03Jiq6

Really like this! Clever way of dealing with structure creation. Like that you can easily remove walls, ceilings, floors, and houses in an instant. Great work!

is it multiplayer?