Hope it usefull.
Host Software:

Hardware Schematics:

Download version ATmega8:
http://www.ziddu.com/download/20997793/V-USBtester.zip.html
Bigger AVR for support all examples.
Hardware Schematics:

Download version ATmega32:
http://www.ziddu.com/download/21008674/V-USBtester32.zip.html
Any suggestion for improvement welcome
