After going everything I'm glad to see you included the latest AVG 8.0 build. The main thing about the entire guide to note however is this is geared mainly for the 2000/XP/MCE environment. To expand on this you would need to see a Vista section added in since there's still quite a difference to be seen with the new version.
The one thing noticed and why the guide so far is not seeing things Vista geared is the simple difference now seen with the msconfig utility since the programs like AVG run on Vista as well as XP. The image here was captured while displaying the now no longer seen SYSTEM.INI and WIN.INI tabs in VIsta's version of the MS utility there.