/home/isaric/.wine/dosdevices/z:/home/isaric/Vidéos/Myst-IV should be the exact same path as /home/isaric/Vidéos/Myst-IV So I'm not sure what's up with that detour path? Anyway, what kind of permissions are asked? If you have run Wine as root before, you messed up the wineprefix and would HAVE to reset the permissions for ~/.wine and all its contents. If it's the installer you can't run, you will have to give execute permissions to that specific file (at least, if you want to run the exe in a file manager). It's nothing particularly dangerous to do.
