I included the complete folders in the zip file.
If you unpack it you'll have following structure:
\Dungeons & Dragons Online\ui\skins\BlueSkin
You can copy and paste that directly into your own documents folder and it
should be there once you start your DDO client next time
Careful when selecting the skin. The client will lag out for a moment and you might
accidentally hit the default button, which seriously sucks. Hope they fix it soon.