I was wondering could any of you PS3 owners help me out?Here is the thing im currently offshore and we have 2 PS3's plus 2 copy's of COD 4 onboard and are trying to get them hooked up so we can play against each other without playing split screen so through lan party.we have tried just linking them together with crossover cable/ethernet cable but no joy so was wondering do they have to be online which they are not as cant hook them up to internet as this will slow down the server on the boat or can they be plugged into a router to link them?Any help would be great!!