with NCSExpert, you use a laptop and a cable. The software is available for download (free) on-line. The cable as to have a converter in it. The one I bought cost about $100. Here's a link:
http://www.one-stop-electronics.com/...&product_id=16
There are also tutorials available on-line. I wouldn't say it's exactly easy but if you follow directions it goes pretty quickly.
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128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09