Sigh.. I'm getting this when I try to flash the RUU:
C:\phone\Data>fastboot flash zip 0P6BIMG.zip target reported max download size of 1830711296 bytes sending 'zip' (1572932 KB)... OKAY [ 47.228s] writing 'zip'... FAILED (remote: not allowed) finished. total time: 47.237s
Keep the command line stuff to a minimum and use the GUI of the recovery, that's why they're there.