http://blogs.technet.com/aralves/archive/2007/03/01/outlook-2007-pdf-previewer.aspxWith Outlook 2007 you don't have to open Word or Excel to view an attachment in a mail. But you can use the built-in previewers. Foxit PDF preview handler released a pdf previewer which works with Outlook 2007 running on Windows Vista. Download FoxitenCommunityServer 2.1 SP1 (Build: 61025.2)