hi, i remember using a playlist once to find infection but i just cant find it anywere, and cant look anything up. iv tried looking all over the reach menu and on this site. i cant find anything. i never got into multiplayer mutch until recently so i cant figure out how to find/use playist, or download/get/use custom maps. like how iv seen 'speed halo'. y isnt there video guides for this stuff T.T please help? and if ur able advice on the other stuff?