Simple solution I use is based on the reset xbox code being attached to the b button from the main menu.
Open default.xip\default.xap and search for
CODE
control DEF theMainMenuJoy Joystick
Then immediately BEFORE the line that reads
CODE
function OnADown()
Now I attached it to the X button so I inserted
CODE
function OnXDown()
{
PlaySoundB();
AutoLaunch();
}
{
PlaySoundB();
AutoLaunch();
}
This should work assuming that you don''t have anything else running from the X button. It won't ask any questions it just Launches the DVD.