Good question.
Lets say Alice installed and is running JanusVM on her PC (192.168.0.100).
Bob would have to type "\\192.168.0.100\Setup\Run.BAT" in his Run prompt to install the VPN to Alice's JanusVM instance.
THE ONLY THING BOB HAS TO CHANGE IS THE LOGIN NAME ON THE VPN CONNECTION. (This is why we left it there)
By default, the name is "guest". Just use guest2, guest3, ... guest9.
If you want to add more logins, edit the /etc/ppp/chap-secrets file in JanusVM.
Enjoy.