https://bugs.winehq.org/show_bug.cgi?id=38115
--- Comment #7 from Alexandre Julliard julliard@winehq.org --- (In reply to Matteo Bruni from comment #6)
I guess this bug could be fixed by e.g. storing the short filenames in extended attributes and then using a compatible short filename encoding. Not trivial but if you want to take a stab at it it would be great ;)
If I understand correctly, this bug is about the filenames on the CD, so extended attributes won't help. You probably need to tweak the CD mount options (joliet etc.) to show the long file names.