@Countach92:
Nope, me and my brother (bwazzaboy) can play cod4 at the same time because we have 2 games of it!
We are playing on the same internet connection and when he starts his game, he need to restart the router, but with my game into the same PS3 and also at mine (at the same time) i don't need to!
It must be something with the game!!
There's sometimes I need to restart the router with my game too, but not often!
meh i just wait till my conection gets better then its all better