It was touched upon in this thread but it sounds to me like this is a bit of a problem and the ideal solution would have been to have the extra maps, kinda outside the system. By that I mean that they are just randomly added when a game starts but the player has to select them to be available and will thereby go into a special lobby system for map pack owners only.
Ha, I hope that made sense!
On a positive note.. I now have the Map Pack!!
Played on it briefly on split screen to see what they looked like.
I was impressed.
Originally I downloaded the pack on my UK account and wasn't able to play them on my 2 US copies.
It was only today I realised that one of my other PS3s has a US account!
Marvellous..
