Ah, the tutorial you are reading is aimed at the LS1.
As suggested above there is one for the E38, look in the Tune Tool help menu under tutorials for 'Virtual VE Tutorial'. Whilst the concept is the same, the way the VE table is changed is different to the LS1.
Also, please see this thread -
http://forum.efilive.com/showthread.php?t=8961

Cheers,
Ross