Here's my experience!

I DIT IT!

Well...
- the open map is quite too light, (i've not found even my city near Paris... :/) but i can't critize. I'll try to find routenplaner to test another maps.
- I've putted the right XML files, modified for maps. Ok. Works... but good only with gtk library. I don't understand why, but in submenus of the native interface, impossible to type any route! Setting "no" to normal gui, and "yes" to gtk, i can type and make it calculate. Quite long (not surprising with a beta), but working.
- Executing by the icon make navit unstable. Execute it with root privilege make stable. Perharps a grant problem on some files?
- no crash log, but some alerts to "Can't load "name of the file.xpm". Maybe do i need to put many more icons?
(the XML profile which i tool is from this post
http://talk.maemo.org/showpost.php?p...&postcount=127
only modified for the map, and the gui valor).

I'll test it much more, but i can validate that:
- It works
- It is not so complicate as i thought (yeah... it's not automatic... And what? )
- Open street map is not enough (for now, will see later) to make a real substitute to a not free map system
- Quite stable (for a first experience), but when executing with xterm.


Why not implement a small .sh which execute
If it's possible, of course.

I'll try to understand why my gui interface doesn't really good...