You are able to achieve this goal through following solutions.
1. Create a driver component for your device.
2. Use devcon.exe of winddk to install the driver. http://support.microsoft.com/?kbid=311272
thanks.
The microsoft loopback adapter component don't working.
hklm\system\curencontrolset\services\msloop is created but the subkey enum
don't exist.
It's a bug of component??
i tried with devcon, the loopback working.
thanks again.