Themken: Sorry for being dense in this matter :-( but I do not know as I never looked into how these work in detail.
Maybe some temp folder?
Probably.
I have sort of solved it though - brute force and ignorance style - I edited the script file and removed the checksum bit below:
if (! sha256sum -c <<<"525beba74bfac98f7b9c4f266c1162f6c12662a1b7b2850349537a612c14b4b9 $CACHEDIR/winewrap/dgVoodoo2_63_1.zip") ; then
echo "ERROR: Checksum failed for dgVoodoo2_63_1.zip !"
rm "$CACHEDIR/winewrap/dgVoodoo2_63_1.zip"
exit 11
fi
Not very scientific or even safe, I know, but it did the trick and it is all installed now.
Thanks for being willing to help out!