Thanks for the posts - I think I get the general gist, but I don't think it is quite what I am after...

The server I was talking about was just a music server for Rio Receiver/streaming rather than another PC. The firewall/NAT is the one in the router.

The multiple port question was more along these lines - my router forwards the ports that Messenger uses to my main PC's IP address, so Messenger works fine from there through the firewall. However, if I want to use Messenger fully on my webpad, the ports are now forwarded to the wrong PC. Without changing the port forwarding everytime, is there any way I can redirect to the same PC that the original request came from?

The network is the Netgear DG824M wired direct to the main PC running XP Home, and wirelessly to the Webpad running 98SE.

Am I missing something else (very likely )

Cheers

Nick