S Haller,
Please look @ the following Knowledge Base (KB) article http://support.microsoft.com/kb/928218/en-us. Here you will find detailed instructions for removing beta release versions of Office Suite 2007 or program.
Important: This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
Description of the Microsoft Windows registries: http://support.microsoft.com/kb/256986/
Please post again if you need further assistance. Thank you and hope your weekend is great.
Thank you
Stephen Holm
OGA Forum Manager