i want to take a largger hd to replace the original hd in the xbox. when i run the "unlock hdd" function of evox and reboot the xbox,i get error code 05. Now i cant' boot the xbox anymore because of this error. i guess the reason is my xbox's bios doesn't support using a unlocked hd to startup,so i think i should upgrade my bios to resolve the problem.BUT because i can't making the xbox startup,how can i upgrade the bios.IS THERE ANY OTHER METHOD to upgrade bios. PLEASE HELP ME!!