the joystick breakout board files are for the thb series thumbsticks available at digikey, unfortunately I can't seem to save descriptions under those files, but they were created by 07_sev under public commons license.
to program the controller, just go to cleric-k's vjoyserialfeeder page.
I have my sketch pasted below, and config available for download, if you would like to use those, although the setup from vjoyserial is very easy.
my arduino page is here.
I will later include a discussion and theory about using 4 joysticks, and ideal configuration, however my recommendations are in the above description!
My favorite games that currently work well with the controller are : Orbital Racer, Starmade, Absolute Territory (excellent for low performance budget computers), and Infinity Battlescape. I also like Astrokill. More recently I now enjoy Flight of Nova. I highly recommend my Starmade world download for navigation challenges, and Starmade has a demo-version on steam which is the full version of the game. Also there is a game below, called MicroGravityDreams which is just a little minigame.