You should unpack the .rar file (!), not the .szs files. When you open the .bat file from the rar archive, it will probably be temporarily copied. Other files from the archive won't be copied, so the .bat file won't be able to find the convertWBZ-to-SZS.sh file it is looking for. Extract all contents to a folder, then open Windows Explorer, find the folder and open the .bat file that is located in the folder (not the one from the archive). Then the .bat file will work fine, you won't get error messages and files will be created in the auto-add folder.
When you download those custom track files, probably from wiki.tockdom.com, look first if there is a .szs file for the track you want to implement. Some authors will upload both the .szs and .wbz formats. If you might need any help implementing those tracks or changing music or names from tracks in the Mariokart menu, please say so. I have done these things myself so I know how it works.
Good luck.
410172
When you download those custom track files, probably from wiki.tockdom.com, look first if there is a .szs file for the track you want to implement. Some authors will upload both the .szs and .wbz formats. If you might need any help implementing those tracks or changing music or names from tracks in the Mariokart menu, please say so. I have done these things myself so I know how it works.
Good luck.
410172

![[Image: hhMMMgO.png]](http://i.imgur.com/hhMMMgO.png)