(You want Flasher 3.12.1 thats the harmattan one, the other flasher-3.5 126.96.36.199 didn't detect my device.)
2. Then you will need to get the firmware image for your device, I used NaviFirm from http://www.symbian-toys.com/navifirm.aspx
Ensure you get the correct firmware!
3. Run Harmattan Flasher and type:
To flash ONLY rootFS:
flasher -F FIRMWAREIMAGE.bin -f
To flash root and EMMC use this command:
Flasher -f -F rootFS.bin -F EMMC.bin -R
4. Turn off N9 and plug into computer. Hold off button until the flasher detects the boot loader and starts flashing. (NB: May take several attempts at holding power button)
(5.) For Windows users, you may have to open the installing device drivers window once N9 is plugged in and "skip Windows driver Lookup".
Another more detailed version: http://forum.meego.com/showpost.php?...9&postcount=41