(Or on cable/modem/750/USB choose properties -> driver and choose upgrade driver, browse for the driver (should already be unpacked in some folder on your harddrive)
:D
Mind you:
This can only be done with so calles "digitaly signed" drivers in WinXP (service pack2).
For eaxmple the "DCU-60_USBFlash_drivers.zip" from here are not signed.
If thats the case, the system will not let you choose these.
They were the ones to use in my case tho... (You have to use the register editor and stuff)