the perfect softmod setup ...
Get a xtender or another case that can hold multiple harddisks ...
keep your original in as an original and put in a larger softmodded hdd in extra...
u can boot original and play on live without trouble.. (how long will it take for them to start scanning for the save games of dvd2xbox avalaunch etc, this a mod chip cant even prevent)
And you can have a modded harddrive in there with all your software homebrew games, movies music everything u want...