To get the Major Update of Nero 6 and the PowerPack you have to download all 4 update packages.
If you are only interested in the Nero PowerPack, please just download package 1 and package 2, which you need to install both to get the full functionality.
We recommend that you download all 4 packages to enjoy all brand-new features included in the Major Update.
get them here:
http://www.nero.com/en/nero-up.php
Cheerz
IB