Ok, i have read about 22 pages of this thread and i still need clarification. Personally i modded my xbox with a 200GB hdd before it even touched live and i have not been banned, i play halo 2 on xbl almost every night no problem. But my question is for a friend. He just started an account on XBL and has been playing with me. Well now he wants to mod his xbox with a 120GB hdd. As far as i understand i will have to flash his xbox with a new virgin eeprom (which i got from a friend who cant go on XBL so i know its legit) when i put the new HDD in. But then i came across the local marriage theory and i would like to know if this has been proven to work. He has not been banned and if it is possible i would like to upgrade his hdd without chaning the eeprom. Is that possible? If not its not big deal, he just really does not wanna get banned from XBL but he is willing to gamble. I'm just trying to take every precaution to ensure that he doesnt get banned from XBL. Thanks for the the help.