MOSS 2007 - Trick >> Search Scope + Managed Properties

http://blah.winsmarts.com/2007-5-MOSS_2007_Trick_-_Search_Scopes_+_Managed_Properties__Tasty_Dish.aspx

http://msmvps.com/blogs/sundar_narasiman/archive/2008/02/06/configuring-moss-2007-to-search-pdf-documents-install-and-configure-pdf-ifilters.aspx