It's not documented in English, as the documentation is currently in German language only.
However, In short:
- Extract the contents of the ZIP file (make sure the path names are retained)
- Install the firmware updating tool (in the NOXON_2\NOXON_Firmware_Manager directory)
- Run the upgrade tool.
- After the Noxon is detected (it only finds mine on wired LAN, not wireless), flash it with the 2008-01-23_noxon2_terratec_firmware_FW6834_HWID158.bcd (found in the Bootloader directory)
- Once everything has completed, redetect your Noxon2, and then upgrade it with the 2008-12-05_NOXON2_TerraTec_firmware_FW6900_HWID158.bcd (found in the fireware directory)
That's it. You will lose all your settings, favorites and such. There is a Favorites commander tool, which you might want to use to back up the favorites before you start, and then send them back after the upgrade.
Clearly this is BETA firmware, and if things go wrong, you are on your own, however I have upgraded 2x Noxon2 units twice so far, without any problems... (There is a anxious pause during he upgrade procedure, where the Noxon has a blank screen for about 30 seconds or so, this is normal, just leave it. Also I have seen it display http:\\ during the upgrade, no idea what this is for!!!! Again, seems to be normal.)
I have been REALLY impressed with the new firmware, it's a very large step forward for me. It's also got a few nice features thrown in, like local history of files/streams played, graphic equaliser settings, and massives amounts of bug fixes.