Unzip & open "index". Determine which of 4 drivers applies to your OS & modem type. Unzip desired driver (preferably to a sub-folder)noting path/location of extracted files. Go to CNTRL PAN > SYSTEM > DEVICE MGR > Modem > Modem-Properties, pick "update driver" and direct Win-PnP to path/loc of your extracted driver. I experienced a dramatic transfer rate inc. on an x2 modem.