Is there a secret button combination like a PC's F2 or Delete that forces an Xbox to boot from a CD?
closed as off topic by Journeyman Geek, Linker3000, slhck♦, Nifle, nhinkle♦ Sep 17 '11 at 8:17
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It's likely you need to have the console 'modded' at least in some way. There may be other ways... But it looks like it will not be as simple as putting in a regular livecd and pressing buttons.
A lot of the guides and stories are a few years old now, so subsequent patches and hardware changes may make some of the guides invalid now.
Have a look at some guides and communities around this: