Adding Apple USB to Ethernet Driver to WinPE Failed to Find Any Drivers to Add

I am trying to add a driver for an Apple USB to ethernet adapter.  It uses an Asix AX88772 driver.  I have the 32 bit Vista driver.  There is your usual .inf, .cat, and .sys files in the folder yet when trying to add the driver using the Boot Wizard I get the message Failed to import driver xxxx Failed to find any drivers to add.  I am not sure what to do next.  Other drivers install fine.