I've just never done it, I have owned the latest snap on solus scan tools for the last 6 years, and am fluent with engine and fuel data within the scan tool so I should catch on quickly. The injector stuff was my only real misunderstanding so far.
Check out this 06 GT I just picked up yesterday! I did a engine rnr in a 2010 Cruze for the title.
http://i86.photobucket.com/albums/k1...pselnbkwwt.jpg