This short post will demonstrate how to configure multiple sites to use SSL on the same IP using Host Header Bindings. This example is appropriate when you have a wildcard SSL or a unified communications certificate and you want to run multiple websites over port 443.
These commands will need to be run on the web server. Just open a command prompt and navigate to the folder containing adsutil.vbs (usually c:\inetpub\adminscripts).
cscript.exe adsutil.vbs set /w3svc/[site identifier]/SecureBindings ":443:[host header]"
Just run this command for each site that needs to run over SSL and you are done.