So since i had some spare time i tried your idea, i cleaned the SD completely and formatted the card, installed the 9401 fan edition and followed the 9 steps, than added content such as maps etc. the first time the device started and gave ma an OLD interface (the blue maze one) and after the config steps the menu was empty, no buttons what so ever, which makes it hard to operate:D so i rebooted the device after which it looped just after the splash screen, i manually removed a number of files such as settings.dat, zip, voices, loquendo and after every file i tried to start it up again which failed of course. eventuallly i moved back to my old 7851 and it works again so no luck with updating. looking forward for the next test