Thanks Martomo. I'll give that a go.
I was using the 2008-01-13 SVN rev11320 build, but I see there is another from the 27th.
Still, at the time, this would have been the latest build, right?
I wondered if the 2.00 skin message might be displayed as a general "catch all" for problems, if the folder structure was wrong in the rar or something, for example....
Giving it a go with the latest build now