Microsoft has just released a hotfix to address AMT 4 / AMT 5 power control within System Center Configuration Manager 2007 Service Pack 1.
System Center Configuration Manager 2007 (KB957469):
Description: The Out of Band Power control function does not work for clients that have the Intel AMT 4 or Intel AMT 5 chipset in System Center Configuration Manager 2007 Service Pack 1
http://support.microsoft.com/kb/957469
Please reference the following WIKI for a comprehensive list of required software bundles and hotfixes for SCCM SP1 and vPro/AMT Out of Band Management: http://communities.intel.com/openport/docs/DOC-1897
--Matt Royer
