Download images:

Firmware:
RX-51_2009SE_20.2010.36-2.004_PR_COMBINED_004_ARM.bin
http://skeiron.org/tablets-dev/nokia...ED_004_ARM.bin

EMMC:
RX-51_2009SE_10.2010.13-2.VANILLA_PR_EMMC_MR0_ARM.bin
http://skeiron.org/tablets-dev/nokia...MC_MR0_ARM.bin

Download flasher:

Windows flasher: http://skeiron.org/tablets-dev/maemo....5_2.5.2.2.exe

Linux flasher: http://skeiron.org/tablets-dev/maemo...5.2.2_i386.deb
Install with (32 bit linux): sudo dpkg -i maemo_flasher-3.5_2.5.2.2_i386.deb
Install with (64 bit linux): sudo dpkg -i --force-architecture maemo_flasher-3.5_2.5.2.2_i386.deb

Flash:
sudo ./flasher-3.5 -F RX-51_2009SE_20.2010.36-2.004_PR_COMBINED_004_ARM.bin -f
sudo ./flasher-3.5 -F RX-51_2009SE_10.2010.13-2.VANILLA_PR_EMMC_MR0_ARM.bin -f -R