Will system inputs in mess save?

RetroArch Windows devices
#1

Been trying to map my controls for a few systems in mess. I can not get the inputs to stayed mapped. Just wondering if there is a way.

#2

They save for me http://www.libretro.com/index.php/mamemessume-cores/#comment-1827229383

#3

I am lost in that in that link. is there a a easier step by step guide.