ORIGINAL: Prince of Eckmühl
Should be no problem, whatsoever. You'll be using the internal IP addys for your network, which ought to read 192.168.x.x when you run IPCONFIG from a command prompt. Open the game, put in the host IP on your network, and you're good to go.
PoE (aka ivanmoe)
Well, I'm nearly getting convinced to buy it, just need to seek permission to get the funding I think. Is there any point buying the boxed version instead of download (e.g. is there a good manual in the boxed one)?