This is the driver for Fm 5687 with the above mentioned chip reference no.
This should work perfectly for win 98 se as well as other earlier versions of windows. Unzip this file to any folder. If adriver is already installed then you only need to update it via the device manager directing it to the unzipped folder and windows will recognize it as the best driver for this device. If no other driver is installed for this device then only guide the driver install wizard to the unzipped folder and the windows will recognize it as the best driver for this device.