WinXP SP3 - installing Android USB Driver
In order to get the usb_driver to install on my system, I had to add the 3 lines suggested by BWinmill to android_winusb.inf:
%SingleAdbInterface% = USB_Install, USB\VID_2237&PID_2208
%CompositeAdbInterface% = USB_Install, USB\VID_2237&PID_2208&MI_01
%SingleBootLoaderInterface% = USB_Install, USB\VID_2237&PID_0FFF
under [Google.NTx86] and [Google.NTamd64].
After doing that, updating the driver and the rest of the instructions worked perfectly for me. Thanks!