HowTo: Unblock restricted file attachments in Microsoft Outlook 2007
; (broken) http://blogs.msdn.com/nicold/archive/2008/03/25/howto-unblock-restricted-file-attachments-in-microsoft-outlook-2007.aspx
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-Start...Run..."regedit"
-Go to HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security
-Create a new string value called Level1Remove
-Enter in the file extensions you want to use, such as .exe or .bat
-You can have multiple file types separated by a semicolon like this: ".exe;.com"
-Close and open outlook.