http://blogs.technet.com/stufox/archive/2009/03/04/subselect-syntax-in-config-mgr.aspxI'm mostly posting this as a reminder to myself, but someone may find it useful. This is the subselect syntax for ConfigMgr queries, so you can do a query along the lines of "Show me all the machines that meet criteria X except the machines that meeten-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/stufox/archive/2009/03/04/subselect-syntax-in-config-mgr.aspx#3233815Fri, 01 May 2009 04:45:03 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3233815DeployTech<P>Love your work, Stu. &nbsp;This also works with identifying the GUID of the installed application, as often the display names are the same across versions.</P>