Adding maps.... We'll get there in a moment, but I noted from an earlier post you put up that you've updated to Ubuntu 10.04 (which I have as well). There is a problem with 10.04 which I haven't seen fixed. The Ubuntu team misnumbered the version numbers of navit and it causes navit some issues.... I noted the solution to that here:
and pay attention to this:
Since I don't have access to my car, I can't tell you the exact directory the map files needs to be dropped in. But you can figure that out by looking in /etc/navit/navit.xml for a line that looks like:
<map type="binfile" enabled="yes" data="/media/mmc2/maps/*.bin"/>
Using this example -- one would drop your .bin file into /media/mmc2/maps.