First, is this a 64 bit or 32 bit version of Windows? I believe 32 bit correct? I am not sure if the reason for the failure is because you have the drivers on the same USB flash drive as Windows or not. During the install, you selected Load Drivers button at the bottom of the screen (In the window that asks where you want to install Windows) correct?
If you have then I would try downloading this driver and see if it works. If you can, put the drivers on another USB flash drive and when the screen asks for drivers, attach the USB to another port and then press the load drivers button.
First is for 32 bit
Second is for 64bit