I have 2 machines that I use system linked regularly. I have bought and downloaded map packs for both Halo 3 and Halo Reach. I have downloaded them to both machines. The maps work fine on each machine but will NOT work when system linked. I get a message that says "Players failed to load content" and the maps only show in the list when I have my gamer tag signed in. Is there any way to play them without buying them for each player?