Thanks for the swift reply. The mod works fine if - and in my case, only if - it isn't placed in a sub-folder. When I initially moved the files from a sub-folder into the main overide folder the appearance.2de file somehow failed to move. Someone other than myself is obviously to blame for this, as I would never be so negligent as to fail to notice that I'd - I mean they'd - not added an essential file.
Joking aside, top job on the skins. Thanks again.