SainSmart USB Host Sheild and Arduino Mega 2560

Hi all,

I’m new to arduino. I’ve completed the basics tutorials for arduino on the arduino page. I want to connect my joystick to my arduino board. For this, I’ve purchased the sainssmart USB host sheild so that I may connect my USB Joystick. I’m googling a lot to find a tutorial or documentation on how I can use the sainsmart USB host sheild with the arduino. Can someone help me on this?