I had the same problem: backupmenu almost frozen and restore did not produce any good result... I had to re-flash, but the battery was down. Thus I manually recharged the battery using a 9V battery charger connected throughout a 100ohm resistance... after two days, and monitoring the battery voltage every two hours, I got a full battery, ready for re-flash... Then after re-flashing the fiasco image I was able to save the FAT partition on my notebook. Then I re-flashed everything but even if I have a running N900 and the backupmenu images, I cannot use them because I changed the kernel (KP52)... pkz