It's been a while since I set this up, but I will suggest that you try to run tolower (from the weidu package) in the BG1 directory as well (if you haven't already). It may be missing the files because it is searching for the lower case names and complaining when they aren't there.
As far as I can tell, the files are all in lower case.
Just went over them.
Thanks for trying to help! I really appreciate it!
/ramforth