You need to create the correct folder structure - the files don't just go in one flat directory.
The INI file used to build the WinPE image will tell you where everything goes.
In the package, I don't see an INI file, but I do have "eetech.inf" which seems to be what you are talking about. The file indicates that, for instance, "EpeTechMainWnd.xml" needs to be placed in the Themes subfolder. But, when I put it there, & I attempt to launch EETech, it is still complaining about that file. I would have thought that if I put that first file in the right directory, it should at least be complaining about a different file now.
This is very confusing.. Does there happen to be an article or something that describes where all these various files need to go?