ICF Custom Port Settings

Hi Folks -

I'm using Windows Server 2003 and need to configure some custom ports
in ICF on multiple machines. Can anyone tell me where in the Windows
registry my custom port definitions are saved? The GUI tool that is
used to set custom port settings is very clunky and it would be easier
to setup the ports via a registry patch file or GPO - especially when
I need to set them up on multiple machines. If they are not saved in
the registry where are they saved? Is there a 3rd party tool that can
do this better and I don't mean a 3rd party firewall as the stock one
is what I have to deal with.

Any help here would be great.

Michael