The Linux FTDI USB driver provided is version 1.2.1. More information on the driver, including updated versions can be found at http://ftdi-usb-sio.sourceforge.net/. The driver should be compiled either as a loadable module or into a kernel. The PID should be changed in the header file to "0xEE18" which corresponds to the PID used on FTDI USB Converter in the MaxStream PKG-U.