Thanks for the pointers. I went and downloaded the files, and also noticed the *.lrs files there, which I've been looking for - there were two. I tried to convert these using the lrs2lrf program, and the log file contained "Can not create LRF Header" - and also some Japanese.
Is this the problem that you are seeing? I would have thought that the pages this guy posted on his site would have been properly formatted and parsable by XylogParser.dll so I'm thinking that maybe I'm doing something wrong.