I don't know about XBMC but Xlink Kai just goes on your computer and then you pick a game that supports system link play and put it in your xbox and select system link so it looks for a system link game then in Xlink Kai just find the game you put in and see if anyone is hosting that game if they are click the game title then click on one of the games and then go to your xbox select the game (if the game is not showing up in the system link menu either hit refresh or if no refresh option just go to the games main menu and go bak to system link and it should be refreshed) and play!! (note you can select game using xlink kai first and then put the game in your xbox or the other way around)