Nah, RealNitro means you type it into the XTerm on your 770 - download the .deb package from the application catalogue on maemo.org

The command above copies one of the themes to your memory card so you can download it over the USB connection.

I just did it (works fine) - man there are a lot of files (459 images and 8Kb of XML)! There could well be tools to help you with this, but even if you just want to edit the current theme so change colours etc, it's gonna be a long session with the GIMP! (or Photoshop if you're so inclined )

You'd really want to be able to edit a whole screen at a time and later chop it all up automatically, as well as generating (rather than editing by hand!) the required XML.

I haven't read up on it yet, but in the meanwhile, any suggestions on how to go about this?