Since day one this game has given serious lag for me and my friends when we try to play Co-Op over Xbox Live (it affected both of us, host AND client, equally).
At the weekend we played Co-Op over system link when I went to visit him. It was perfect, no lag anywhere.
The problem with this is that he lives 96 miles away and neither of us a network cable that long.
Is there a way to trick our routers into letting us play a system link game over the internet and cut out Xbox Live as the game would do if we were in the same house?