It's missing parts and for obvious reasons it doesn't validate. But I was able read the Epub file in NookStudy (without difficulty). I then tried to fix the problems with Sigil, the Epub editor. Unfortunately Sigil couldn't load it. I don't blame it; this is a kludgy way of making an Epub.
This might not amount to much more than a trick, but I think it's shiny. But given that there's an Epub maker plug-in for Open Office, it really only is a trick. It's not really good for much. You need OO to make an ODT file, and with the plug-in you might as well make a valid Epub.