I'll jump in here, with another question. What happens if you and your opponent are on the same Local Area Network? I tried typing in the 127.0.0.1 address on the non-hosting computer, and it wouldn't show. I tried typing in the IP address of the host, and multi-player crashes whenever I try to go into it. I'd assume I need a local area address of some kind, but I have no clue where to start looking for it.

Any ideas?