RetroArch: Remapping your controller (I used RetroPie)
This video shows (or tries to!) how to remap controller buttons in RetroArch. Not the most clear video, but hopefully you should get the idea.
I ran this using RetroPie 3 for the Raspberry Pi, but the principal should work with any RetroArch distribution.
It isnt a video to show how to get your controller working, but instead how to remap buttons on a per core or per game basis.
Overview of the RetroPad:
http://wiki.libretro.com/index.php?title=RetroPad
Examples of RetroPad layouts:
https://github.com/RetroPie/RetroPie-Setup/wiki/RetroArch-Configuration
Control Pad Remapping:
http://webcache.googleusercontent.com/search?q=cache:R-qcGT8AAVIJ:blog.andressm.org/new-retroarch-features-2/+&cd=1&hl=en&ct=clnk&gl=uk
RetroArch release of remapping:
http://www.libretro.com/index.php/retroarch-1-2-july-4-release-kickoff/
To auto load remaps, put this in the system based retroarch.cfg file.
auto_remaps_enable = "true"
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