hi guys, im from venezuela, i bought my 360 used, i dont have the original firmware so , what should i do? if i encounter problems with this fall update, there's a way to get out of trouble considering that i can't go back to the original firmware? i'm sure somebody can help me with this, sorry about my english by the way, thanks in advance! greettings!

Im not definate about this but i think you would be able to dump the firmware thats on there now and retreive your key from it and inject into another ORIG.bin from someone elses drive providing its the same make/model and firmware and voila you have yourself an orig.bin should you need to reflash after err66. If im wrong im wrong sorry.