go to the cable driver web site. read the ECMSPy tuning guide version 2. google it . also run it all as the administrator!!
http://www.ecmspy.com/tgv2/guide2.shtml
drivers here; http://www.ftdichip.com/
also google and read the
(Future Technology Devices
International Ltd.)
ftdi chip
Windows XP Installation cable Guide
search for..;
Windows_XP_Installation_Guide for cable pdf.
it has the info on how install it that you need.