Thank you for the roply.
The reason is because it is not my xbox - it is a firends who is not computer savy and all he want is to boot straight to XBMC.....
As it stands his chip always boots to x3 config live - and it will not save any setting made in x3 config live.
I am going to get him to come over and attempt to reflash an x3 bios, but failing that - I want to just use the x2 bios which has no config screen and will boot him straight to his dash.