Call of duty waw maps for free on cod black ops mod error?

hi guys if u look up on you tube how to get free waw zombie maps for black ops it will tell u to download stuff then drag it onto a folder and then put it on a usb stick and then into your xbox i did all that but when i see the files on my usb from xbox 360 it say for u black ops fans who no what i am talking about it says black ops taco543 or something like that when i see it on my xbox it keeps saying corrupted profile i dont no why i think it maybe because i need xbox live or something i dont have it if anyone nos the problem and how to fix it please answer my question and please give me as much detail as u can thank u black ops fans