I tried for months to get INPA/GT1 going. I am also in IT & thought no problem easy peasy.
NO!
I ended up with 4 cables & only after the ebay seller remoted in repeatedly had everything going. Spend the 35 bucks, get his deal and if needed have him remote in.
Coding related thread:
http://www.xoutpost.com/bmw-sav-foru...etup-help.html
Romanian solution;
BMW USB OBD Diagnostic Cable Inpa Ediabas Dis SSS GT1 Easy Self Installer | eBay