I personally dislike that method because i've bricked the odd unit here and there [no problem to cure them, but it's a hassle for new users]. I've never bricked a unit using Updater.exe and correct XXX.01000.xxx.rgn naming however. Maybe tattooman forgot to remove an existing GUPDATE.GCD file from .System [as said in Point 1 of P#2] which would flash it back to V4.30 on reboot. At least the WU method with doctored XML file overcomes that potential trap and admittedly there's really little chance of bricking with using gupdate.gcd file anyway.... [but it's there regardless ].