here you go:
http://www.brettsinger.net/zaurus/
i posted the zip file i used
zfceucompletesl5500.zip
which has libs and brief instructions. it says 5500, but i use it on a 5600. if it doesn't work, check the libs and see if you have the appropriate version for your z.
and if anyone can figure out how to use the hardware buttons instead of the keyboard, please post! :-)
enjoy...