As you migrate to ConfigMgr 2012, or even if you retain your ConfigMgr 2007, if you haven’t already encountered the slightly confusing aspect of the ConfigMgr Client’s ability to read and use HKLM\Software vs. HKLM\Syswow6432\Software, hopefully the following chart may help you.
Sherry Kissinger is a App Systems Engineer with Wells Fargo. She has been working with SMS since version 2.0. She participates in Microsoft newsgroups, forums on myITForum.com and the myITForum.com mailing list. She also specializes in automating software deployment using Windows Installer, Transforms, and vbscripting. She also answers questions posed to the "email@example.com"