Hi, For your problem with the 3 reboots then FRAG, did tthe screen say it flashed successfully ?]
because if it did, then it probably worked. Try pressing the eject button after the 3 reboots, right when before it starts to frag, and it should bring you to your bios, It's been mentioned on here before, it worked for me, maybe it'll work for you. I think its mayb a little voltage error with the xbox v1.0 because mine was fragging, then i pressed the eject button upon frag after the 3 reboots and the bios appeared..
hey its worth a try, let me know if it works. I think its justa problem with the bank and voltages probably, because mine still reboots 3 times then frags when i switch between banks 1 and 0, but all i do now is press eject button when the frag starts and it works, (assuming you soldered your BT wire to the front pcb)
Good Luck !