Instructions: copy and replace files in data/karts/sara_the_racer folder in stk 1.2 with ones in the mod zip fie...keep a backup of original files if you want to revert changes... 

As per the agreement of GPLv3 the modified material is being released...source material is GPL and CC0 and maybe CC-BY-SA and LGPL all of which are compatible with one another under GPLv3...

https://creativecommons.org/share-your-work/licensing-considerations/com...

https://commons.wikimedia.org/wiki/File:Python-logo-notext.svg

https://commons.wikimedia.org/wiki/File:Snake_silhouette.svg

Python is owned by Python Software Foundation and released under GPL compatible PSFL...

SuperTuxKart credits: https://github.com/supertuxkart/stk-code/blob/master/data/CREDITS

is released under GPLv3

https://github.com/supertuxkart/stk-code/blob/master/COPYING

Sara is OpenGameArt mascot

This mod loosely resembles RenPy mascot Eileen who is not yet in STK as of version 1.2...

renpy released under LGPL license and more permissive licenses https://www.renpy.org/doc/html/license.html

renpy credits: https://github.com/renpy/renpy/graphs/contributors