There is an easier way!
I wasted several hours trying to get kobo-desktop to run first on a Mac PPC, then on my 64 bit machine. (Multi booting GNU/Linux) Finally succeeded with Ubuntu 10.04 Lucid, only to find that there is a much simpler way which should work on any Linux, BSD, or OS/X machine. It comes from Antoine Amarilli, to whom I am very grateful. His blog is at:
Plug the device in and mount it if it doesn't auto-mount. Then in a terminal type a command similar to:
echo "insert into user values('foo', 'foo', 'foo', 'foo', 'foo');" | sqlite3 /mnt/kobo/.kobo/KoboReader.sqlite
I say similar to, because the path to the .kobo file may be different, and your PC may mount it at a different point.