I am in the same situation. I also can't play alf-Grand Chess,
alf-courier... This seems connected to the fact that when I try to open
the boards with Paint under Windows XP, I get only a black image. I
haven't had the same problem with later(?) boards, e.g. for Chess on a
Longer Board with a few pieces added. Regarding Glinski, it concerns only
the hex6x6gs.bmp file.
(I could open the Francis Monkman courier2 file from courier1.zip with
Paint and tweak it to get a 12x8 board for Jacks and Witches.)