For more info, see this thread:
http://www.murga.org/%7Epuppy/viewtopic.php?t=2972
Simply download and install the Dotpup, then start xearth in the Dotpups-menue.
For further configuration see the original-thread.
Downoad (136 kb):
http://noforum.de/dotpups/xearth-1.1.pup
Mark