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[beetle]

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[CoFree]

im trying to burn a backed up 360 game, using a kreon firmware

im not sure what you are asking.
kreon firmware is in the dvd drive that would/should be in your computer to dump a orig game.
if you use xbc to dump the game you should have all the stealth file in the iso and it should be fine to burn.
if you burn with the dvd file that is the layer break.

if you got the iso from some where else then there is no telling if the iso is good or not.

if xbc gives you all green when you do a image check on the iso then
i guess its good.

what is a layer break?

on a DL dvd disc the layer break is the point when the writing starts on the 2nd layer
the 1st layer writes to 1913759 and the 2nd layer starts from there.

Also if i go on live are my backups as secure as a backup can be?

as long as you dumped the game your self then yes the iso is a safe as it can be.
if you got the iso some how (download) then there is no tell if it is safe or not.