Just got around to finally getting a 360 and I have a question. I only bought the 360 slim 4GB model for 3 games. NHL13, L4D 1&2. But, there is not enough room for all the DLC for L4D 1&2, my quesiton is can I download all the additional DLC to a thumbdrive and play the few DLC levels from the thumbdrive or will they play slow and choppy of the thumbdrive. Oh, and just one more question to L4D experts, I see that L4D 1&2 each have their own "Sacrifice" level in DLC. Do I need to purchase both, seems like a little bit of a rip off to purchase the same level twice just to play it with 4 different characters, unless it is different in some other way, thanks all.