by Anon » 23 Aug 2014, 05:47
If you feel like editing xml files, you could change the settings manually in input.xml. On Linux, this is found in $HOME/.config/supertuxkart/. I'm not sure where it is in Windows, maybe in APPDATA.
You'll probably find that the file doesn't actually say what axis or button anything is. Instead, it'll have an "event" and an "id" for each action. I think "event" refers to what type of input is mapped (button/axis), while "id" specifies which one of that type is used. So for example, event 3 and id 2 might mean axis 2, while event 2 and id 3 could mean button 3.
There's probably an easier way to do it, but if all else fails, this method should still work.