How do you make your own challenge lobby for ps3

I have looked everywhere but only hunter128 and co know how
challenge lobbies are ur best bet
Basically u can't


2. Ok if you want everything in call of duty mw2, and its for ps3. add me my name is N4TION_SOLDI3R and yo can tryout for our clan and we will get you everythign for both accounts but if you have very bad accuracy you might not make it the clan so you can add me bu any1 can join and we need good quickscopers ty