Modded Xbox

[FSG]

most likely yes.... i dont play halo anymore so i wouldnt know

[PolarPyro]

You cannot have a modchip enabled on xbox live. same goes with action replay. What the people are doing in halo 2 is they are modding the new maps only, because they are on the hard drive, not on the halo 2 disc, so they can edit values to make them jump high, turn the auto aim to be really sensitive, and so on. If you have a modchip or action replay and you use it with xbox live, your EEPROM will be banned.

[Duffman]

The EEPROM is this small string of data on the hard drive that identifies your HD as your HD genuine from an xbox and not any other ones. So when you put a bigger hd in an xbox it requires formatting and cloning the old drive so your eeprom can stay intact. If you do get banned from xblive it's not the end of the world, you can buy an eeprom off of ebay, althogh it is a bit risky.