I'd like to update the firmware of my N900. NSU doesn't do the trick as I'm using a beta firmware. I'd like to update to a official FW. Maemo-flasher 3.5 does not work at all in Windows 7 64bit. I followed the guide and it just hangs saying "Suitable USB device not found". Yes, I did the 'u' thing while connecting the cable. Any ideas how to proceed?