Ok...I know someone who will Flash my box for me...Says he doesnt even have to open the box, therefore the warrenty is still safe...Says he just uses a jack or usb something...uploads some type of program onto the HD that allows you to use backups, play online, get past firmware updates, and again...keep the warrenty...So I ask, is this true, can it be done WITHOUT so much as cracking open the box itself? Or should I not trust this person?