The bios files inside 430vbios.zip archive NOT have at one's disposal the USB support.
On the contrary, the files inside 430vbios_USB.zip archive have at one's disposal the USB support.
The following files are found inside the driver download file.
|Um3_5usb.bin||131.1 KB||21 Oct 2001|
|SM2_5USB.BIN||131.1 KB||26 Oct 2001|
|Um3_6usb.bin||131.1 KB||21 Oct 2001|
|Updates.txt||1.5 KB||26 Oct 2001|