It just poped into my head.. Somone may of thought of this but what the hell.
What if a new upgrade was burned onto a CD-R from the xbox website then an old xbox update was also burned. Once the update process begins (Or before that) swap the disc with the older update so once the process begins it will overwright the new with the old... Could this work? If it wouldn't can someone just explain to me what's wrong with it and why it wouldn't?

i doubt it would work because the update is just a single file, once its loaded into memory swapping the disc wont do anything, and if you swap before its loaded youll either get aw read error, or the old update will will just run (and not update because its older than what you have)

honestly though, with something like this, if you want to know what will happen, go do it yourself an dpost RESULTS, not speculation (read the pinned topics)