I didn't flash through terminal. I have a mac, and all I did was use Flasher770 and only flashed the new firmware in. As far as I'm concerned, you shouldn't have to flash the emmc unless it's a pre-production device. I might be wrong; either way, only flash the new firmware

Thanks...Worked for me as well..Flashed only the firmware image.....Does extra d-level still work..Cuz i cant sync it

I am still having no luck I have downloaded the flasher program put a new battery in and tried the flash via command line in windows.

As soon as I put the battery in it starts that damn loop and will not get out it telling me that is installing software do not bother it.
Holding the u key down while plugging in the usb I see the usb symbol at the top of the screen as soon as I run flasher-3.5.exe -F RX-51_2009SE_3.2010.02-8_PR_COMBINED_MR0_ARM.bin
another command window pops up runs through some stuff real fast for a couple of seconds then back to the loop again.

I finally got it to flash.. YEAH..

I had to take the battery out hook up the USB cable hold the u key down while slid the battery back in the loop stopped and it came up in USB mode and the flash took.

I think you could update both the FIASCO and eMMC without reboot in the middle.
But, note that this is errase all your data completely.. you might consider restoring the backup from external Memory card

i got the same problem , could someone help me ?