if you are interested in learning to tune your own car this is a cheap and easy way go...
Tuning software:
http://www.tunercat.com/tnr_desc/do_tc.html
you will need the file for your car:
http://www.tunercat.com/tnr_desc/do_tc.html
The aldl cable:
get the good one
http://www.akmcables.com/ic.htm
scanning software:
http://www.akmcables.com/dss.htm
Wide band O2:
http://www.innovatemotorsports.com/lm1.php
this all will help anyone willing to tune there own car as well as others for a small price ofcourse...