This is weird, I tried the loopback cable, it didn't work till 10-20 minute.. So i tried a different method and it seem to work......
If you press eject, durring the boot screen when it say MS, if pressing the right time, the xbox load phenix 1.3.5i.... (without the loopback or network cable)
i tried like 10 time and it seem to work... weird... can someone try this too and see if it work.. also, make sure there are no cd or dvd in the drive....
by the way, my drive is 616t, and using pheonix 1.3.5.i.....