Internet Connection Sharing with Juno

Recently I set up a network in a home and the owner wishes to share the internet connection. Had this been a conventional DUN setup, no problem but this one is Juno. Any suggestions on how to set this up? Both PC’s are on XP with Juno software installed. Thought about setting up an internet gateway with the desktop NIC connected to the uplink port on the router. Would this work and how?

Thanks!