The Group Policy team has published installation packages that distribute ADM files (below) for use with Windows XP SP2 and Windows Server 2003 SP1.
Administrative Templates for Internet Explorer 7 for Windows
Download from: http://go.microsoft.com/fwlink/?LinkId=77998
Administrative Template file for PowerShell for Windows.
Download from: http://go.microsoft.com/fwlink/?LinkId=77999