On Windows XP, to change the HTTPS secure port binding (e.g. to port 444 instead of 443), run the following adsutil script at the command prompt:
C:\Inetpub\AdminScripts>cscript adsutil.vbs set w3svc/1/securebindings ":444:"
Return:
Microsoft (R) Windows Script Host Version 5.7 Copyright (C) Microsoft Corporation. All rights reserved. securebindings : (LIST) ":444:"