Thank you for your reply. After posting my question, I have gone thorough your first post and successfully installed Navit. I even downloaded maps from 'http://maps.navit-project.org/download/' and loaded them to one of my SD Card on my N800. Only thing I don't know is how to edit the Navit.xml file and change the maps path to the SD card. Please help me with this.

One more clarification, when we start the Navit, it won't launch the GPS application automatically, we need to launch it from the Control Panel, right?? Correct me if I am wrong.

Thank you.