This video shows where the config files are to configure USB controllers with RetroPie 2.3. Very similar in 2.6.0 etc.. <br />Feel free to post details of any manual edits you find work well. <br /> <br />RetroPie autoconfig function: <br />http://blog.petrockblock.com/2013/12/02/retropie-autoconfig-functionality/ <br /> <br />Part 1 here: <br />http://dai.ly/x2hudlt
