The first thing you must remember that Win XP has its theme folder in X:/Windows/Resources/Themes where X is the drive where Win XP is installed. You need to extract them here to be automatically detected. So when you right click on the Desktop and go to "Properties" you will get the theme (here Matrix) under the Themes Tab.
U can use also a third party program like ThemeXp (
www.tgtsoft.com ) to install the themes..
I have not seen this month's DVD since I it has not arrived yet but if it is a normal theme pack then extract it on the path given above...