I assume you mean only one external IP and various internal IPs? That's perfectly fine,
although if the NAT (Router, internet sharing software, etc.) doesn't have Universal Plug and
Play (UPnP) capability, some features may not work.
____________________________________________
Jonathan Kay
Microsoft MVP - MSN Messenger/Windows Messenger
Associate Expert http://www.microsoft.com/windowsxp/expertzone/
Messenger Resources - http://messenger.jonathankay.com