mw2 challenge lobby

any one hosting a challenge lobby for 11th prestige (10th is fine also)

if you are add my psn or post your's here and ill add.

also what is the difference in challenge lobbys and, the other thing (sorry forgot name but it is like infections or something?)

Thanks for looking

psn:abhikbhatia

10th prestige lobby is better because you dont look like an hacker with your 11th prestige